C1111233131211111211113313331333131211111211111333133313331323221221   >>    C111123313121111121111331333133313121111121111133313331333132322122   <<    C1111233131211111211113313331333131211111211111333133313331323221223   >>      C1111233131211111211113313331333131211111211111333133313331323221222   >>