Nested If / Else - Cannot Determine Logical Mistake

The title says already where my difficulties are. I forgot to say, the "S" printing part works, but why the others doesn't. To make it more clear:

java Monoton 1 3 3 4 & java Monoton 1 3 4 1

=> nothing (my output)

I forgot to notice, with 1 3 3 4 as parameters it jumps out at if (b < c), which is expected. but it jumps out of the whole if instead just run the else part. that's the essence of my problem.

The Exercise:

=> The program should print the following letters;

S, if every number is true bigger than the before,

M, if every number is bigger or equal than the before,

N in the other cases

Examples (from the exercise)

=> java Monoton 0 1 2 4

S

=> java Monoton 1 3 3 4

M

=> java Monoton 1 3 4 1

N

The Exercise should done without the use of logical operators or other combined requirements.

Java Code:

public class Main {
public static void main(String[] args) {
int a = Integer.parseInt(args[0]);
int b = Integer.parseInt(args[1]);
int c = Integer.parseInt(args[2]);
int d = Integer.parseInt(args[3]);

[Code] .....