def jys(s):
    d={"1":"0","0":"1"}
    n=len(s)
    ns=""
    p=s[0]
    __________
    while i<n:
        num=0
        while __________:
            num=num*10+int(s[i])
            i+=1
        __________
        ns+=p*num
        __________
    return ns

s=input()
print(jys(s))