def parse(file, store):
        f = open(file, 'r')
        dic = {}
        for i in f:
                i = i.strip("\n")
                val = i.split("\t")
                try:
                        dic[val[0]] = dic[val[0]] + ","+ val[1]
                except KeyError:
                        dic[val[0]] = val[1]
        f.close()
        f = open(store, 'w')
        for i in dic.keys():
                string = i+"\t"+dic[i]
                f.write(string+"\n")
        f.close

if __name__=="__main__":
        import sys
        if len(sys.argv) > 1:
                file = sys.argv[1]
                store = sys.argv[2]
                parse(file, store)
        else:
                sys.exit("No input")