function main(n) {
  const q = [ ["A", "E"], ["B"], ["C"], ["D"] ];
  for(let i=0; i<n; i++) {
    q[(i+1)%4].push( q[i%4].shift() );
  }
  for(let i=0; i<q.length; i++) {
    console.log(q[i].join(""));
  }
}

main(require("fs").readFileSync("/dev/stdin", "utf8").split("\n")[0]);