Question: When starting the program, the user must enter a sentence. Then the program should print the frequency of each letter in the sentence (java). Example

When starting the program, the user must enter a sentence. Then the program should print the frequency of each letter in the sentence (java). Example of input "Hello world" Program result: "H-1 e-1 l-3 o-2 w-1 r-1 d-1"

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