C11111211113313112113313331333133313331333132311233133313331333133313211231321   >>    C1111121111331311211331333133313331333133313231123313331333133313331321123132   <<    C11111211113313112113313331333133313331333132311233133313331333133313211231323   >>      C11111211113313112113313331333133313331333132311233133313331333133313211231322   >>