C111123313331323113313331333133313331323131211113313121111331333132313222321   >>    C11112331333132311331333133313331333132313121111331312111133133313231322232   <<    C111123313331323113313331333133313331323131211113313121111331333132313222323   >>      C111123313331323113313331333133313331323131211113313121111331333132313222322   >>