def parse():
    st = str(input("enter the eliments       "))
    s1 = str()
    s2 = str()
    s3 = str()
    for i in st:
        if (i >= "0") and (i <= "9"):
            s1 += i
        elif (i == "+") or (i == "-") or (i == "*") or (i == "/"):
            s2 = i
            s3 = s1
            s1 = str()
    return (int(s3), s2, int(s1))

x,y,z = parse()
print ("{0}@{1}@{2}".format(x,y,z))