const bf = (x, y) => {
    const n = x.length, m = y.length
    for (let i = 0; i <= n - m; i++) {
        for (let j = 0; j < m; j++) {
            if (x[i + j] == y[j] && j == m - 1) {
                console.log(i)
            } else if (x[i + j] != y[j]) {
                break
            }
        }
    }
}
bf("wuuconix", "conix")