C11111211113313112113313331333133313331333132322121111331311331333131231321   >>    C1111121111331311211331333133313331333133313232212111133131133133313123132   <<    C11111211113313112113313331333133313331333132322121111331311331333131231323   >>      C11111211113313112113313331333133313331333132322121111331311331333131231322   >>