C1111233131211111211113313331333133313331312331333133112323132211331   >>    C111123313121111121111331333133313331333131233133313311232313221133   <<    C1111233131211111211113313331333133313331312331333133112323132211333   >>      C1111233131211111211113313331333133313331312331333133112323132211332   >>