function encrypt(mensagem) {
var substituicoes = { 'a': '4', 'e': '3', 'i': '2', 'o': '1', 'u': '0' };
var output = '';
for (var i = mensagem.length - 1; i >= 0; i--) {
var char = mensagem[i];
output += substituicoes[char] || char;
}
return output + 'ece';
}
console.log(encrypt('banana'));
ZnVuY3Rpb24gZW5jcnlwdChtZW5zYWdlbSkgewogICAgdmFyIHN1YnN0aXR1aWNvZXMgPSB7ICdhJzogJzQnLCAnZSc6ICczJywgJ2knOiAnMicsICdvJzogJzEnLCAndSc6ICcwJyB9OwogICAgdmFyIG91dHB1dCA9ICcnOwogICAgZm9yICh2YXIgaSA9IG1lbnNhZ2VtLmxlbmd0aCAtIDE7IGkgPj0gMDsgaS0tKSB7CiAgICAgICAgdmFyIGNoYXIgPSBtZW5zYWdlbVtpXTsKICAgICAgICBvdXRwdXQgKz0gc3Vic3RpdHVpY29lc1tjaGFyXSB8fCBjaGFyOwogICAgfQogICAgcmV0dXJuIG91dHB1dCArICdlY2UnOwp9Cgpjb25zb2xlLmxvZyhlbmNyeXB0KCdiYW5hbmEnKSk7Cg==