AnnSyh

function isOpposite(s1,s2){
  //coding here...
    const a = s1.split("");
    const b = s2.split("");
    var c = [];

    if (a.length !== b.length){ return false}
    if ((a.length === 0)&&(b.length === 0)){return false}
    
    for (var i = 0; i < a.length; i++)

AnnSyh

'use strict';

var gulp = require('gulp'),
    watch = require('gulp-watch'),
    prefixer = require('gulp-autoprefixer'),
    uglify = require('gulp-uglify'),
    sass = require('gulp-sass'),
    sourcemaps = require('gulp-sourcemaps'),
    rigger = require('gulp-rigger'),
    cssmin = require('gulp-minify-css'),