C11112331333132311331333133313331333132313332113313231323221211   >>    C1111233133313231133133313331333133313231333211331323132322121   <<    C11112331333132311331333133313331333132313332113313231323221213   >>      C11112331333132311331333133313331333132313332113313231323221212   >>