C11111211113313112113313331333133313331333131211113313232233222311   >>    C1111121111331311211331333133313331333133313121111331323223322231   <<    C11111211113313112113313331333133313331333131211113313232233222313   >>      C11111211113313112113313331333133313331333131211113313232233222312   >>