C131121333133313233213331333133313331333133313211231333131121321   >>    C13112133313331323321333133313331333133313331321123133313112132   <<    C131121333133313233213331333133313331333133313211231333131121323   >>      C131121333133313233213331333133313331333133313211231333131121322   >>