C11112331333132311331333133313331333132313311331311221123233231   >>    C1111233133313231133133313331333133313231331133131122112323323   <<    C11112331333132311331333133313331333132313311331311221123233233   >>      C11112331333132311331333133313331333132313311331311221123233232   >>