a,s=input().split()
if a == 'E':
current = s[0]
cnt = 1
for i in range(1,len(s)):
if s[i] != current:
print(current+str(cnt),end="")
current = s[i]
cnt=1
else:
cnt+=1
print(current+str(cnt))
elif a == 'D':
for i in range(0,len(s),2):
print(end=s[i]*int(s[i+1]))
print()