function minDistance(s1, s2) {
const l1 = s1.length;
const l2 = s2.length;
const matrix = [];
for (let i = 0; i <= l1.length; i++) {
matrix[i] = []
for (let j = 0; j <= l2.length; j++) {
if (i === 0) {
matrix[i][j] = j
} else if (j === 0) {
matrix[i][j] = i
} else {
let cont = 0;
if(s1[i-1]!==s2[j-1]){
cont =1
}
}
}
}
}
console.log(minDistance('abc', 'abe'))