let line = readline()

//替换掉非字母的字符
let str = line.split('')
for(let i = 0; i < str.length; i++){
  if((str[i] >= 'A' && str[i] <= 'Z') || (str[i] >= 'a' && str[i] <= 'z')){
    str[i] = str[i]
  }else{
    str[i] = ' '
  }
}

line = str.join('')
let strArr = line.split(' ').reverse().join(' ')

console.log(strArr)