ydi1 zdi12 0di12x 1di1 2di12

n4i12 o4i12x p4i1 q4i12 r4i12x

cvj12x dvj1 evj12 fvj12x gvj1

1lk1 2lk12 3lk12x 4lk1 5lk12

qcl12 rcl12x scl1 tcl12 ucl12x