Javascript ES6

Write a function called countingLetters. The countingLetters function accepts a string and array arguments. The goal of the function is to count the occurance of letter in the sentence. The return should be an object with the key as the lowercase letter and the count as the value. The function should not include counts with anything from the punctions array. There should not be duplicate letters in the object including counts for capital letters vs lowercase letters (T and t) should just be t. const quote = 'The greatest glory in living lies not in never falling, but in rising every time ctuations countingLetters (quote, punctions); cons UUTICLU LION EXPECTED OUTPUT (object): { t: 6,h: 1,e: 10,5: 5,r: 5, a: 3, s: 3,1: 7,0: 2,y: 2,i: 10,n: 8,v: 3,f: 2,b: 1, u: 1,m: 1,w: 1