a=input()
b=""
c=""
d=0
e=0
for i in a:
    if not(i>="A" and i<="Z"):
        c=c+i
    else:
        d=len(c)
        for x in c:
            e+=int(x)*(10**(d-1))
            d-=1
        while e>0:
            b+=i
            e-=1
        e=0
        c=""
print(b)