## Day 7 Task:

→ 2085. Count Common Words With One Occurrence:

### Solutions:

Please review all the solutions and try implementing on your own if you haven’t gotten it.

```
class Solution:
def countWords(self, words1: List[str], words2: List[str]) -> int:
d = {}
ans = 0
for i in range(len(words1)):
if words1[i] not in d:
d[words1[i]] = 1
else:
d[words1[i]] += 1
for i in range(len(words1)):
if(words1[i] in d):
if(d[words1[i]] > 1):
d.pop(words1[i])
for i in range(len(words2)):
if(words2[i] in d):
d[words2[i]] -= 1
for key in d:
if(d[key] == 0):
ans += 1
return ans
```