Бана👃🏻

const purify = str => str.replace(/-/g, '');
const replaceChar = (str, index, substr) => str.substr(0, index) + substr + str.substr(index+1, str.length);
const TARGET = "banana";

const bananas = function(str, currIndex = 0) {
    const result = [];
    let pure = purify(str);
    if (pure.length > TARGET.length) {
        for (let i = currIndex; i < str.length && str[i] != '-'; i++) {
            let temp = replaceChar(str, i, '-');
            if (purify(temp) == TARGET) {
                result.push(temp);
                continue;
            }
            if (purify(temp).length > TARGET.length) {
                result.push(
                    ...bananas(temp, i + 1)
                );
            }
        }
    } else if (pure == TARGET) {
        result.push(str);
    }
    return result;
}