In[32]:=
  Riemann80a = Union[Riemann80 /. {-1 -> 1}]

Out[32]=

  {R     R    , R     R    , R     R    , R     R    , 
    afgh  bcde   agfh  bcde   ahfg  bcde   aegh  bcdf
   
    R     R    , R     R    , R     R    , R     R    , 
     ageh  bcdf   aheg  bcdf   aefh  bcdg   afeh  bcdg
   
    R     R    , R     R    , R     R    , R     R    , 
     ahef  bcdg   aefg  bcdh   afeg  bcdh   agef  bcdh
   
    R     R    , R     R    , R     R    , R     R    , 
     adgh  bcef   agdh  bcef   ahdg  bcef   adfh  bceg
   
    R     R    , R     R    , R     R    , R     R    , 
     afdh  bceg   ahdf  bceg   adfg  bceh   afdg  bceh
   
    R     R    , R     R    , R     R    , R     R    , 
     agdf  bceh   adeh  bcfg   aedh  bcfg   ahde  bcfg
   
    R     R    , R     R    , R     R    , R     R    , 
     adeg  bcfh   aedg  bcfh   agde  bcfh   adef  bcgh
   
    R     R    , R     R    , R     R    , R     R    , 
     aedf  bcgh   afde  bcgh   afgh  bdce   agfh  bdce
   
    R     R    , R     R    , R     R    , R     R    , 
     ahfg  bdce   aegh  bdcf   ageh  bdcf   aheg  bdcf
   
    R     R    , R     R    , R     R    , R     R    , 
     aefh  bdcg   afeh  bdcg   ahef  bdcg   aefg  bdch
   
    R     R    , R     R    , R     R    , R     R    , 
     afeg  bdch   agef  bdch   acgh  bdef   agch  bdef
   
    R     R    , R     R    , R     R    , R     R    , 
     ahcg  bdef   acfh  bdeg   afch  bdeg   ahcf  bdeg
   
    R     R    , R     R    , R     R    , R     R    , 
     acfg  bdeh   afcg  bdeh   agcf  bdeh   aceh  bdfg
   
    R     R    , R     R    , R     R    , R     R    , 
     aech  bdfg   ahce  bdfg   aceg  bdfh   aecg  bdfh
   
    R     R    , R     R    , R     R    , R     R    , 
     agce  bdfh   acef  bdgh   aecf  bdgh   afce  bdgh
   
    R     R    , R     R    , R     R    , R     R    , 
     afgh  becd   agfh  becd   ahfg  becd   adgh  becf
   
    R     R    , R     R    , R     R    , R     R    , 
     agdh  becf   ahdg  becf   adfh  becg   afdh  becg
   
    R     R    , R     R    , R     R    , R     R    , 
     ahdf  becg   adfg  bech   afdg  bech   agdf  bech
   
    R     R    , R     R    , R     R    , R     R    , 
     acgh  bedf   agch  bedf   ahcg  bedf   acfh  bedg
   
    R     R    , R     R    , R     R    , R     R    , 
     afch  bedg   ahcf  bedg   acfg  bedh   afcg  bedh
   
    R     R    , R     R    , R     R    , R     R    , 
     agcf  bedh   acdh  befg   adch  befg   ahcd  befg
   
    R     R    , R     R    , R     R    , R     R    , 
     acdg  befh   adcg  befh   agcd  befh   acdf  begh
   
    R     R    , R     R    , R     R    , R     R    , 
     adcf  begh   afcd  begh   aegh  bfcd   ageh  bfcd
   
    R     R    , R     R    , R     R    , R     R    , 
     aheg  bfcd   adgh  bfce   agdh  bfce   ahdg  bfce
   
    R     R    , R     R    , R     R    , R     R    , 
     adeh  bfcg   aedh  bfcg   ahde  bfcg   adeg  bfch
   
    R     R    , R     R    , R     R    , R     R    , 
     aedg  bfch   agde  bfch   acgh  bfde   agch  bfde
   
    R     R    , R     R    , R     R    , R     R    , 
     ahcg  bfde   aceh  bfdg   aech  bfdg   ahce  bfdg
   
    R     R    , R     R    , R     R    , R     R    , 
     aceg  bfdh   aecg  bfdh   agce  bfdh   acdh  bfeg
   
    R     R    , R     R    , R     R    , R     R    , 
     adch  bfeg   ahcd  bfeg   acdg  bfeh   adcg  bfeh
   
    R     R    , R     R    , R     R    , R     R    , 
     agcd  bfeh   acde  bfgh   adce  bfgh   aecd  bfgh
   
    R     R    , R     R    , R     R    , R     R    , 
     aefh  bgcd   afeh  bgcd   ahef  bgcd   adfh  bgce
   
    R     R    , R     R    , R     R    , R     R    , 
     afdh  bgce   ahdf  bgce   adeh  bgcf   aedh  bgcf
   
    R     R    , R     R    , R     R    , R     R    , 
     ahde  bgcf   adef  bgch   aedf  bgch   afde  bgch
   
    R     R    , R     R    , R     R    , R     R    , 
     acfh  bgde   afch  bgde   ahcf  bgde   aceh  bgdf
   
    R     R    , R     R    , R     R    , R     R    , 
     aech  bgdf   ahce  bgdf   acef  bgdh   aecf  bgdh
   
    R     R    , R     R    , R     R    , R     R    , 
     afce  bgdh   acdh  bgef   adch  bgef   ahcd  bgef
   
    R     R    , R     R    , R     R    , R     R    , 
     acdf  bgeh   adcf  bgeh   afcd  bgeh   acde  bgfh
   
    R     R    , R     R    , R     R    , R     R    , 
     adce  bgfh   aecd  bgfh   aefg  bhcd   afeg  bhcd
   
    R     R    , R     R    , R     R    , R     R    , 
     agef  bhcd   adfg  bhce   afdg  bhce   agdf  bhce
   
    R     R    , R     R    , R     R    , R     R    , 
     adeg  bhcf   aedg  bhcf   agde  bhcf   adef  bhcg
   
    R     R    , R     R    , R     R    , R     R    , 
     aedf  bhcg   afde  bhcg   acfg  bhde   afcg  bhde
   
    R     R    , R     R    , R     R    , R     R    , 
     agcf  bhde   aceg  bhdf   aecg  bhdf   agce  bhdf
   
    R     R    , R     R    , R     R    , R     R    , 
     acef  bhdg   aecf  bhdg   afce  bhdg   acdg  bhef
   
    R     R    , R     R    , R     R    , R     R    , 
     adcg  bhef   agcd  bhef   acdf  bheg   adcf  bheg
   
    R     R    , R     R    , R     R    , R     R    , 
     afcd  bheg   acde  bhfg   adce  bhfg   aecd  bhfg
   
    R     R    , R     R    , R     R    , R     R    , 
     abgh  cdef   agbh  cdef   ahbg  cdef   abfh  cdeg
   
    R     R    , R     R    , R     R    , R     R    , 
     afbh  cdeg   ahbf  cdeg   abfg  cdeh   afbg  cdeh
   
    R     R    , R     R    , R     R    , R     R    , 
     agbf  cdeh   abeh  cdfg   aebh  cdfg   ahbe  cdfg
   
    R     R    , R     R    , R     R    , R     R    , 
     abeg  cdfh   aebg  cdfh   agbe  cdfh   abef  cdgh
   
    R     R    , R     R    , R     R    , R     R    , 
     aebf  cdgh   afbe  cdgh   abgh  cedf   agbh  cedf
   
    R     R    , R     R    , R     R    , R     R    , 
     ahbg  cedf   abfh  cedg   afbh  cedg   ahbf  cedg
   
    R     R    , R     R    , R     R    , R     R    , 
     abfg  cedh   afbg  cedh   agbf  cedh   abdh  cefg
   
    R     R    , R     R    , R     R    , R     R    , 
     adbh  cefg   ahbd  cefg   abdg  cefh   adbg  cefh
   
    R     R    , R     R    , R     R    , R     R    , 
     agbd  cefh   abdf  cegh   adbf  cegh   afbd  cegh
   
    R     R    , R     R    , R     R    , R     R    , 
     abgh  cfde   agbh  cfde   ahbg  cfde   abeh  cfdg
   
    R     R    , R     R    , R     R    , R     R    , 
     aebh  cfdg   ahbe  cfdg   abeg  cfdh   aebg  cfdh
   
    R     R    , R     R    , R     R    , R     R    , 
     agbe  cfdh   abdh  cfeg   adbh  cfeg   ahbd  cfeg
   
    R     R    , R     R    , R     R    , R     R    , 
     abdg  cfeh   adbg  cfeh   agbd  cfeh   abde  cfgh
   
    R     R    , R     R    , R     R    , R     R    , 
     adbe  cfgh   aebd  cfgh   abfh  cgde   afbh  cgde
   
    R     R    , R     R    , R     R    , R     R    , 
     ahbf  cgde   abeh  cgdf   aebh  cgdf   ahbe  cgdf
   
    R     R    , R     R    , R     R    , R     R    , 
     abef  cgdh   aebf  cgdh   afbe  cgdh   abdh  cgef
   
    R     R    , R     R    , R     R    , R     R    , 
     adbh  cgef   ahbd  cgef   abdf  cgeh   adbf  cgeh
   
    R     R    , R     R    , R     R    , R     R    , 
     afbd  cgeh   abde  cgfh   adbe  cgfh   aebd  cgfh
   
    R     R    , R     R    , R     R    , R     R    , 
     abfg  chde   afbg  chde   agbf  chde   abeg  chdf
   
    R     R    , R     R    , R     R    , R     R    , 
     aebg  chdf   agbe  chdf   abef  chdg   aebf  chdg
   
    R     R    , R     R    , R     R    , R     R    , 
     afbe  chdg   abdg  chef   adbg  chef   agbd  chef
   
    R     R    , R     R    , R     R    , R     R    , 
     abdf  cheg   adbf  cheg   afbd  cheg   abde  chfg
   
    R     R    , R     R    , R     R    , R     R    , 
     adbe  chfg   aebd  chfg   abch  defg   acbh  defg
   
    R     R    , R     R    , R     R    , R     R    , 
     ahbc  defg   abcg  defh   acbg  defh   agbc  defh
   
    R     R    , R     R    , R     R    , R     R    , 
     abcf  degh   acbf  degh   afbc  degh   abch  dfeg
   
    R     R    , R     R    , R     R    , R     R    , 
     acbh  dfeg   ahbc  dfeg   abcg  dfeh   acbg  dfeh
   
    R     R    , R     R    , R     R    , R     R    , 
     agbc  dfeh   abce  dfgh   acbe  dfgh   aebc  dfgh
   
    R     R    , R     R    , R     R    , R     R    , 
     abch  dgef   acbh  dgef   ahbc  dgef   abcf  dgeh
   
    R     R    , R     R    , R     R    , R     R    , 
     acbf  dgeh   afbc  dgeh   abce  dgfh   acbe  dgfh
   
    R     R    , R     R    , R     R    , R     R    , 
     aebc  dgfh   abcg  dhef   acbg  dhef   agbc  dhef
   
    R     R    , R     R    , R     R    , R     R    , 
     abcf  dheg   acbf  dheg   afbc  dheg   abce  dhfg
   
    R     R    , R     R    , R     R    , R     R    , 
     acbe  dhfg   aebc  dhfg   abcd  efgh   acbd  efgh
   
    R     R    , R     R    , R     R    , R     R    , 
     adbc  efgh   abcd  egfh   acbd  egfh   adbc  egfh
   
    R     R    , R     R    , R     R    }
     abcd  ehfg   acbd  ehfg   adbc  ehfg

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