function solve (input) {
  let substractor = Number(input.shift())
  input.pop()
  let regex = /@([A-Za-z]+)[^@\-!:>]*!G!/

  for (let param of input) {
    let currentLine = param
      .split('')
      .map(x => x.charCodeAt(0))
      .map(x => x - substractor)
      .map(x => String.fromCharCode(x))
      .join('')

    let match = currentLine.match(regex)

    if (match) {
      console.log(match[1])
    }
  }
}