In this task, you need to replace a letter in the sentence with another given letter.

Ex Input:
Sentence: 'a man on the news, watched on the television'. Replace the letter 'o' with 'z' in the sentence.

Ex Output:
a man zn the news, watched zn the televisizn


Ex Input:
Sentence: 'a table full of various types of cellphones, pdas and pagers'. Replace the letter 's' with 'f' in the sentence.

Ex Output:
a table full of variouf typef of cellphonef, pdaf and pagerf


Ex Input:
Sentence: 'a man and his children ride a miniature train in front of two older men riding the same train'. Replace the letter 'd' with 'g' in the sentence.

Ex Output:

a man ang his chilgren rige a miniature train in front of two olger men riging the same train