"R1" "R2" "R3" "S1" "S2" "S3" "T1" "T2" "T3" "U1" "U2" "U3" "V1" "V2" "V3" "W1" "W2" "W3" "X1" "X2" "X3" "Y1" "Y2" "Y3"
1 1 1 2 2 2 3 3 3 4 4 4 5 5 5 6 6 6 7 7 7 8 8 8
