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

Sentence: 'a u.s. military helicopter landing or taking off'. Replace the letter 'i' with 'l' in the sentence.
a u.s. mllltary hellcopter landlng or taklng off

Sentence: 'a table full of various types of cellphones, pdas and pagers'. Replace the letter 's' with 'f' in the sentence.
a table full of variouf typef of cellphonef, pdaf and pagerf

Sentence: 'oranges sitting in a blue bowl on a wooden table'. Replace the letter 'a' with 'y' in the sentence.

orynges sitting in y blue bowl on y wooden tyble