C131121333133313233213331333133313331333133313231333131122112112223331   >>    C13112133313331323321333133313331333133313331323133313112211211222333   <<    C131121333133313233213331333133313331333133313231333131122112112223333   >>      C131121333133313233213331333133313331333133313231333131122112112223332   >>