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

Sentence: 'a black and white picture of a hitter awaiting a pitch while a teammate stands in the on deck circle'. Replace the letter 'a' with 'm' in the sentence.
m blmck mnd white picture of m hitter mwmiting m pitch while m temmmmte stmnds in the on deck circle

Sentence: 'the cargo train is headed to the next destination'. Replace the letter 'h' with 'x' in the sentence.
txe cargo train is xeaded to txe next destination

Sentence: 'a red bridge crossing a river by a building'. Replace the letter 'g' with 'y' in the sentence.

a red bridye crossiny a river by a buildiny