C111123313331323113313331333133313331323133112113313113323132321   >>    C11112331333132311331333133313331333132313311211331311332313232   <<    C111123313331323113313331333133313331323133112113313113323132323   >>      C111123313331323113313331333133313331323133112113313113323132322   >>