C111123313331323113313331333133313331323132311233133313221232321   >>    C11112331333132311331333133313331333132313231123313331322123232   <<    C111123313331323113313331333133313331323132311233133313221232323   >>      C111123313331323113313331333133313331323132311233133313221232322   >>