C11111211113313112113313331333133313331322331333133313331333132212111   >>    C1111121111331311211331333133313331333132233133313331333133313221211   <<    C11111211113313112113313331333133313331322331333133313331333132212113   >>      C11111211113313112113313331333133313331322331333133313331333132212112   >>