C11112331333132311331333133313331333132313311211331311211332321   >>    C1111233133313231133133313331333133313231331121133131121133232   <<    C11112331333132311331333133313331333132313311211331311211332323   >>      C11112331333132311331333133313331333132313311211331311211332322   >>