C11111211113313112113313331333133313331333132212111133133313331323132313211   >>    C1111121111331311211331333133313331333133313221211113313331333132313231321   <<    C11111211113313112113313331333133313331333132212111133133313331323132313213   >>      C11111211113313112113313331333133313331333132212111133133313331323132313212   >>