C1111233131211111211113313331323133313231333133311221123132211331   >>    C111123313121111121111331333132313331323133313331122112313221133   <<    C1111233131211111211113313331323133313231333133311221123132211333   >>      C1111233131211111211113313331323133313231333133311221123132211332   >>