viarno reshenie steam of letters1

function streamOfLetters(input) {
    let index = 0;
    let command = input[index++];
    let isO = false;
    let isN = false;
    let isC = false;
    let word = '';
    let result = '';

    while (command !== 'End') {
        let letter = command;

        if (letter >= 'A' && letter <= 'Z' || letter >= 'a' && letter <= 'z') {
            if (letter === 'o' && !isO) {
                isO = true;
            }
            else if (letter === 'n' && !isN) {
                isN = true;
            }
            else if (letter === 'c' && !isC) {
                isC = true;
            }
            else {
                word += letter;
            }

            if (isC && isO && isN) {
                result += word + ' ';
                isO = false;
                isN = false;
                isC = false;
                word ='';

            }
            command = input[index++];
        }
        else {
            command = input[index++];
        }

    }

    console.log(result);
}

// streamOfLetters(["H", "n", "e", "l", "l", "o", "o", "c", "t", "c", "h", "o", "e", "r", "e", "n", "e", "End"]);

streamOfLetters(['%', '!', 'c', '^', 'B', '`', 'o', '%', 'o', 'o', 'M', ')', '{', 'n', '\\', 'A', 'D', 'End']);

// streamOfLetters(['o', 'S', '%', 'o', 'l', '^', 'v', 'e', 'c', 'n', '&', 'm', 'e', 'c', 'o', 'n', 'End']);