public class MyClass {
public static void main(String args[]) {
for (int i = 97; i < 100; i++) {
for (int j = 97; j < 100; j++) {
for (int k = 97; k < 100; k++) {
if (i != j && i != k && j != k) {
System.out.format("%c%c%c\n", i, j, k);
}
}
}
}
}
}
/*
run:
abc
acb
bac
bca
cab
cba
*/