C111123313331323113313331323133313331333132331211113313331323133313331313231311   >>    C11112331333132311331333132313331333133313233121111331333132313331333131323131   <<    C111123313331323113313331323133313331333132331211113313331323133313331313231313   >>      C111123313331323113313331323133313331333132331211113313331323133313331313231312   >>