Input’ a noun. ‘Imput’ an old-fashioned or informal verb.
I’m not sure what the question is asking for but there is a difference between input and imput. The past tense of the word input is “inputted.” The word imput doesn’t have any kind of past tense at all because it’s just an outdated, sexist borrowing from the French word, “emputé”. This same mistake was made with the words for “impress” (a noun) and to impress someone (verb), among many other examples in English that followed suit from French verbs ending with -er, even if they came originally from Latin instead of French.