Most Common Letter

Problem

Return the most frequent letter in the text. Break ties alphabetically by choosing the earliest letter; assume the text is non-empty and contains only uppercase A-Z.

Hint

E is the most common letter in English, but only if your sample is long enough.

Test cases

case 1

in: ["HELLO"]

expected: "L"

case 2

in: ["AABB"]

expected: "A"

case 3

in: ["ZYXZ"]

expected: "Z"

case 4

in: ["ABCD"]

expected: "A"

Starter codePython

def most_common_letter(text):
    # Your code here
    pass

4 test cases · run your code against them in the editor