C1111233131211111211113313331333133313232321333133313331333131133133322231231   >>    C111123313121111121111331333133313331323232133313331333133313113313332223123   <<    C1111233131211111211113313331333133313232321333133313331333131133133322231233   >>      C1111233131211111211113313331333133313232321333133313331333131133133322231232   >>