local n, x, i;

fun printString (x) {
  for i:=0, i<x.length, i:=i+1 do
    write (x[i])    
  od
}

n := read ();

x := "abcdefgh";

printString (x);

for i:=0, i<x.length, i:=i+1 do
  x[i] := x[i]+2
od;

printString (x)