```
class Solution:
# @return a string
def countAndSay(self, n):
if n == 1:
return '1'
x = '1'
while n > 1:
x = self.count(x)
n -= 1
return x
def count(self,x):
m = list(x)
ans =[]
m.append(None)
i , j = 0 , 0
while i < len(m)-1:
j += 1
if m[j] != m[i]:
ans += [ j-i, m[i] ]
i = j
return ''.join(str(s) for s in ans)
```