C111123313331323113313331333133313331323133112113313113313132322332311   >>    C11112331333132311331333133313331333132313311211331311331313232233231   <<    C111123313331323113313331333133313331323133112113313113313132322332313   >>      C111123313331323113313331333133313331323133112113313113313132322332312   >>