C111123313331323113313331333133313331323132311233133313222213112121   >>    C11112331333132311331333133313331333132313231123313331322221311212   <<    C111123313331323113313331333133313331323132311233133313222213112123   >>      C111123313331323113313331333133313331323132311233133313222213112122   >>