C11111211113313112113313331333133313331333121131211111321123232233131   >>    C1111121111331311211331333133313331333133312113121111132112323223313   <<    C11111211113313112113313331333133313331333121131211111321123232233133   >>      C11111211113313112113313331333133313331333121131211111321123232233132   >>