C11112331333132311331333133313331333132313311211331323221211111121333311   >>    C1111233133313231133133313331333133313231331121133132322121111112133331   <<    C11112331333132311331333133313331333132313311211331323221211111121333313   >>      C11112331333132311331333133313331333132313311211331323221211111121333312   >>