C1111233133313231133133313331323133313113313121111331333131332211   >>    C111123313331323113313331333132313331311331312111133133313133221   <<    C1111233133313231133133313331323133313113313121111331333131332213   >>      C1111233133313231133133313331323133313113313121111331333131332212   >>