C11111211113313112113313331333133313233313113121111331323221123321   >>    C1111121111331311211331333133313331323331311312111133132322112332   <<    C11111211113313112113313331333133313233313113121111331323221123323   >>      C11111211113313112113313331333133313233313113121111331323221123322   >>