C11111211113313112113313331333133313113121111331333133313331323132212111   >>    C1111121111331311211331333133313331311312111133133313331333132313221211   <<    C11111211113313112113313331333133313113121111331333133313331323132212113   >>      C11111211113313112113313331333133313113121111331333133313331323132212112   >>