C11111333133313232233133313331333133313231312111133131133132211231   >>    C1111133313331323223313331333133313331323131211113313113313221123   <<    C11111333133313232233133313331333133313231312111133131133132211233   >>      C11111333133313232233133313331333133313231312111133131133132211232   >>