C11111211113313112113313331333133313331333131211113313113313331323223323321   >>    C1111121111331311211331333133313331333133313121111331311331333132322332332   <<    C11111211113313112113313331333133313331333131211113313113313331323223323323   >>      C11111211113313112113313331333133313331333131211113313113313331323223323322   >>