function encryption(s) {
    const noSpaces = s.replaceAll(' ', '');
    const strLen = noSpaces.length;   
    const row = Math.floor(Math.sqrt(strLen));
    const col = Math.ceil(Math.sqrt(strLen)); 
 
    const encryptedArr = [];
    let pos = 0;
    for(let i=0; i<strLen; i++) {
        const str = noSpaces.substr(i, 1);
        
        encryptedArr[pos] = encryptedArr[pos] ?? '';
        encryptedArr[pos] += str;
        
        pos = pos === col-1 ? 0 : pos+1;
    }
    
    return encryptedArr.join(' ');
}