```
punctuation_chars = ["'", '"', ",", ".", "!", ":", ";", '#', '@']
def strip_punctuation(x):
    for i in punctuation_chars:
        for i in x:
            if x=="i":
                x.replace("i","")
                return x
m= "Twi@sd"
t=strip_punctuation(m)
print(t)

```

I am trying to remove specific characters in the string using above code . What is the issue here ?