02,01,02,01,02,01,02,01
01,02,01,02,01,02,01,02
02,01,02,01,02,01,02,01
01,02,01,02,01,02,01,02
02,01,02,01,02,01,02,01
01,02,01,02,01,02,01,02
02,01,02,01,02,01,02,01
01,02,01,02,01,02,01,02