import string

csvfile = open("data.csv", "r")

csvfile.readline()

masterarray = {}

for line in csvfile:
    line = line[:len(line)-1]
    arr = line.split(",")
    try:
        masterarray[arr[0]].append(arr[1])
    except KeyError:
        masterarray[arr[0]] = [arr[1]]

for key in masterarray:
    mystr = key
    mystr2 = ""
    for kw in masterarray[key]:
        mystr2 = mystr2 + kw + ";"
    mystr2 = mystr2[0:len(mystr2)-1]
    print(mystr+","+mystr2)