C11111211113313112113313331333133313331333132313231333133313233311231   >>    C1111121111331311211331333133313331333133313231323133313331323331123   <<    C11111211113313112113313331333133313331333132313231333133313233311233   >>      C11111211113313112113313331333133313331333132313231333133313233311232   >>