C11112331333132311331333133313331333132313311211331323223311111   >>    C1111233133313231133133313331333133313231331121133132322331111   <<    C11112331333132311331333133313331333132313311211331323223311113   >>      C11112331333132311331333133313331333132313311211331323223311112   >>