C1111233131211111211113313331333133313331313221131211111332233221   >>    C111123313121111121111331333133313331333131322113121111133223322   <<    C1111233131211111211113313331333133313331313221131211111332233223   >>      C1111233131211111211113313331333133313331313221131211111332233222   >>