C111123313331323113313331333133313331122112312111133133313121111123122321   >>    C11112331333132311331333133313331333112211231211113313331312111112312232   <<    C111123313331323113313331333133313331122112312111133133313121111123122323   >>      C111123313331323113313331333133313331122112312111133133313121111123122322   >>