C31231211111133131211113313331333133313331323133313221211331321   >>    C3123121111113313121111331333133313331333132313331322121133132   <<    C31231211111133131211113313331333133313331323133313221211331323   >>      C31231211111133131211113313331333133313331323133313221211331322   >>