C111123313331323113313331333133313331323132311233133313223112321   >>    C11112331333132311331333133313331333132313231123313331322311232   <<    C111123313331323113313331333133313331323132311233133313223112323   >>      C111123313331323113313331333133313331323132311233133313223112322   >>