const reader = require("readline").createInterface({
  input: process.stdin,
  output: process.stdout
});
let lines = [];
reader.on("line", line => {
  lines.push(line);
});
reader.on("close", () => {
  newArr =  lines[0].split(' ').map(str => parseInt(str), 10)
  const compute = newArr[0] ** newArr[1] + newArr[2] ** newArr[3] + newArr[4] ** newArr[5]
  if(compute % 2 === 0){
    console.log(':-)')
  }else {
    console.log(':-(')
  }
});