var name = "космос";

var result = "космос";

function equals(word1, word2) {
                var ERR_LEVEL = 1;
                var arrWord1 = word1.split('');
                var arrWord2 = word2.split('');
                if (arrWord1.length !== arrWord2.length) {
                    return false;
                }

                var currentErrorLevel = 0;
                for (var i = 0; i < arrWord1.length; i++) {
                    arrWord1[i] !== arrWord2[i] && currentErrorLevel++;

                }
                return currentErrorLevel <= ERR_LEVEL;
            }