C11111333133313232233133313331333133112111112113313331311331333231333113211321   >>    C1111133313331323223313331333133313311211111211331333131133133323133311321132   <<    C11111333133313232233133313331333133112111112113313331311331333231333113211323   >>      C11111333133313232233133313331333133112111112113313331311331333231333113211322   >>