C111123313331323113313331333133313331323133112113313231333131133132313113311   >>    C11112331333132311331333133313331333132313311211331323133313113313231311331   <<    C111123313331323113313331333133313331323133112113313231333131133132313113313   >>      C111123313331323113313331333133313331323133112113313231333131133132313113312   >>