Problem
Given a sentence S and two words X and Y, replace every occurrence of X with Y.
Input format
Input
input.txt
- String S (up to 100 chars, lowercase, may have spaces) - String X (1–20) - String Y (1–20)
Output format
Output
output.txt
- The sentence after replacements
Example
input
the cat sat on the cat mat cat dog
output
the dog sat on the dog mat dog dog
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Sample cases (from the problem)
Sample Case 1
Input
the cat sat on the cat mat cat dog
Expected output
the dog sat on the dog mat dog dog
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