C11111211113313112113313331333133313331333132313331333133313331333133323212111   >>    C1111121111331311211331333133313331333133313231333133313331333133313332321211   <<    C11111211113313112113313331333133313331333132313331333133313331333133323212113   >>      C11111211113313112113313331333133313331333132313331333133313331333133323212112   >>