C111123313331323113313331333133313231323133312111113231323133313113221321   >>    C11112331333132311331333133313331323132313331211111323132313331311322132   <<    C111123313331323113313331333133313231323133312111113231323133313113221323   >>      C111123313331323113313331333133313231323133312111113231323133313113221322   >>