C312312111111331312111133133313331333133313231323133313331333133313221211211321   >>    C31231211111133131211113313331333133313331323132313331333133313331322121121132   <<    C312312111111331312111133133313331333133313231323133313331333133313221211211323   >>      C312312111111331312111133133313331333133313231323133313331333133313221211211322   >>