C21321133133313121211113313331323133313113121111331333132213331323211   >>    C2132113313331312121111331333132313331311312111133133313221333132321   <<    C21321133133313121211113313331323133313113121111331333132213331323213   >>      C21321133133313121211113313331323133313113121111331333132213331323212   >>