C11111333133313232233133313331333133112111112113313331312111113331333132211321   >>    C1111133313331323223313331333133313311211111211331333131211111333133313221132   <<    C11111333133313232233133313331333133112111112113313331312111113331333132211323   >>      C11111333133313232233133313331333133112111112113313331312111113331333132211322   >>