C1111233131211111211113313331323133313232212111113331322121133133311211   >>    C111123313121111121111331333132313331323221211111333132212113313331121   <<    C1111233131211111211113313331323133313232212111113331322121133133311213   >>      C1111233131211111211113313331323133313232212111113331322121133133311212   >>