C1111233131211111211113313331333133313221211113313331333133313332233221   >>    C111123313121111121111331333133313331322121111331333133313331333223322   <<    C1111233131211111211113313331333133313221211113313331333133313332233223   >>      C1111233131211111211113313331333133313221211113313331333133313332233222   >>