t91ns s91n r91nsm q91ns p91n
4i1n 3i1nsm 2i1ns 1i1n 0i1nsm
fs0nsm es0ns ds0n cs0nsm bs0ns
q1zns p1zn o1znsm n1zns m1zn
1azn 0aznsm zazns yazn xaznsm