sentence
글자별로 분리true
아니라면, false
반환function checkIfPangram(sentence: string): boolean {
const splitted = [...sentence]
const transToCode = splitted.map(char => char.charCodeAt(0))
const sorted = transToCode.toSorted((a, b) => a - b)
let curCode = 97
for(const num of sorted) {
if(num > curCode) return false
else if(num === curCode) curCode++
}
return curCode > 122
};