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I arranged each row in group A in group of 2 letters as shown in Group B below: Group A Group B Row1 A1 A2 A3 A4 {A1,A2},{A1,A3}, {A1,A4},{A2,A3},{A2,A4},{A3,A4} Row2 B1 B2 B3 B4 {B1, B2}{ B1, B3}{ B1, B4}{B2, B3}{ B2,B4}{B3,B4} Row3 C1 C2 C3 C4 {C1,C2} {C1,C3}{C1,C4} {C2,C3} {C2,C4} {C3,C4} Row4 D1 D2 D3D4 {D1,D2} {D1,D3} {D1,D4} {D2,D3} {D2,D4} {D3,D4} Row 5 E1 E2 E3 E4 {E1,E2} {E1,E3} {E1,E4} {E2,E3} {E2,E4} {E3,E4} Row6 F1 F2 F3 F4 { F1, F2} { F1, F3} { F1, F4} { F2, F3} { F2, F4} { F3, F4} Row 7 G1 G2 G3 G4 {G1,G2} {G1,G3} {G1,G4} {G2,G3} {G2,G4} {G3,G4} Row 8 H1 H2 H3 H4 {H1,H2} {H1,H3} {H1,H4} {H2,H3} {H2,H4} {H3,H4} Row9 I1 I2 I3 I4 {I1,I2} {I1,I3} {I1,I4} {I2,I3} {I2,I4} {I3,I4} (51in total) I need to combine each group of 2 letters (i.e. A1,A2 thru J2,J3) in Group B above to 3 different letters one each from 3 different rows from Group A taking 1 letter each from a row at a given time. That is, without taking two letters from each row at a given time. My first result will be {(A1,A2)}{(B1,C1,D1). I will not repeat any letters from row 1 from group A and whenever I pick (A1,A3) I will only combine it with only 3 different letters from 3 different rows until I reach (I2,I3) (3 different letters one from each row)

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