er7x7 fr7x7y gr7x hr7x7 ir7x7y

3h8x7y 4h8x 5h8x7 6h8x7y 7h8x

s88x t88x7 u88x7y v88x w88x7

hz9x7 iz9x7y jz9x kz9x7 lz9x7y

6pay7y 7pay 8pay7 9pay7y aqay