function solve (params) {
  let key = Number(params.shift())
  params.pop()
  let pattern = /@([a-zA-Z]+)[^@\-!:>]+!G!/

  let checkWords = []

  for (let i = 0; i < params.length; i++) {
    let split = params[i].split('')
    let words = []
    for (let j = 0; j < split.length; j++) {
      let currentSymbol = split[j]
      currentSymbol = currentSymbol.charCodeAt(0)
      let afterKey = currentSymbol - key
      afterKey = String.fromCharCode(afterKey)
      words.push(afterKey)
    }
    checkWords.push(words.join(''))
  }
  // let santaList = []
  for (let i = 0; i < checkWords.length; i++) {
    let currentChild = checkWords[i]
    if (currentChild.match(pattern)) {
      console.log(currentChild.match(pattern)[1])
      // santaList.push(currentChild)
    }
  }
}