C1111233131211111211113313331333133313331322331333131211113313231312311   >>    C111123313121111121111331333133313331333132233133313121111331323131231   <<    C1111233131211111211113313331333133313331322331333131211113313231312313   >>      C1111233131211111211113313331333133313331322331333131211113313231312312   >>