C11111211113313112113313331333133313331312111133132213311223213131   >>    C1111121111331311211331333133313331333131211113313221331122321313   <<    C11111211113313112113313331333133313331312111133132213311223213133   >>      C11111211113313112113313331333133313331312111133132213311223213132   >>