C11111333133313232233133313331333133112111112113313232213331323211321   >>    C1111133313331323223313331333133313311211111211331323221333132321132   <<    C11111333133313232233133313331333133112111112113313232213331323211323   >>      C11111333133313232233133313331333133112111112113313232213331323211322   >>