#!/bin/env python

s=input()
h=''
count=''
uz=''
for x in s:
    if x.isalpha():
        if h != '':
            uz+=h*(1 if count =='' else int(count))
        h=x
        count=''
    elif x.isdigit():
        count+=x
    else:
        if h != '':
            uz+=h*(1 if count =='' else int(count))
        #should not happen for our case. input could be invalid
        count=''
        h=''
        #warn if necessary
if h != '':
    uz+=h*(1 if count =='' else int(count))

print(uz)