C111123313331323113313331333133313331323133112113313221211111133131121211   >>    C11112331333132311331333133313331333132313311211331322121111113313112121   <<    C111123313331323113313331333133313331323133112113313221211111133131121213   >>      C111123313331323113313331333133313331323133112113313221211111133131121212   >>