Xiaoliang and grandpa went for a walk in the playground together. It takes Xiaoliang 6 minutes to walk around, and it takes 8 minutes for Grandpa to walk around. If two people start from the same place at the same time and walk towards each other, how many times will they meet in 4 minutes? (Enter "can" or "can't" in brackets)
小亮和爷爷一起去操场散步．小亮走一圈需要6分钟，爷爷走一圈需要8分钟．如果两人同时同地出发，相背而行，4分钟多少相遇．(括号中填"能"或"不能")
<result>4</result>