C111123313331323113313331333133313331323133112113313231333133313112131231   >>    C11112331333132311331333133313331333132313311211331323133313331311213123   <<    C111123313331323113313331333133313331323133112113313231333133313112131233   >>      C111123313331323113313331333133313331323133112113313231333133313112131232   >>