I123133313233313231313331322132313231333132313112331323331323331323211221   >>    I12313331323331323131333132213231323133313231311233132333132333132321122   <<    I123133313233313231313331322132313231333132313112331323331323331323211223   >>      I123133313233313231313331322132313231333132313112331323331323331323211222   >>