C1111233131211111211113313331333133313232321333131333131121132121   >>    C111123313121111121111331333133313331323232133313133313112113212   <<    C1111233131211111211113313331333133313232321333131333131121132123   >>      C1111233131211111211113313331333133313232321333131333131121132122   >>