def mergeMaxValue(lst): m = len(max(lst, key=len)) newLst = [(i,i+i[-1]*(m-len(i))) for i in lst] newLst.sort(key=lambda item:item[1], reverse=True) result = "".join(item[0] for item in newLst) print(result) lst = list(map(str, input().split(','))) mergeMaxValue(lst)