C11111211113313112113313331333133313233313113121111331323223311   >>    C1111121111331311211331333133313331323331311312111133132322331   <<    C11111211113313112113313331333133313233313113121111331323223313   >>      C11111211113313112113313331333133313233313113121111331323223312   >>