结合字典列表元素的长度大于2

I have a dictionary with lists for values. The length of the lists must not be greater than 2. What I need to do is combine the list elements starting at the second element and join with the next element until the length of the list is equal to 2. My attempt below works but it seems like this could be done easier and I am just not seeing it.I have a dictionary with lists for values. The