#include <stdio.h>
#include <math.h>
 
int main() {
	int l, c, r1, r2, maior;
	char saida;
 
	while ( scanf("%i %i %i %i",&l, &c, &r1, &r2) ) {
		if(l == 0 && c == 0 && r1 == 0 && r2 == 0) { return 0; }
		//o teste poderia ser: l+c+r1+r2 == 0
		//como os numeros sao sempre positivos, nao teria problema
 
		saida = 'N';
		if (r1 > r2) {
			maior = r1 * 2;
		} else {
			maior = r2 * 2;
		}
 
		if(maior <= l && maior <= c) {
			if(sqrt(pow((l - r2 - r1), 2) + pow((c - r2 - r1), 2)) >=  r1 + r2) {
				saida = 'S';
			}
		}
 
		printf("%c\n",saida);	
	}	
	return 0;
}

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MTEgOSAyIDMKNyA4IDMgMgoxMCAxNSAzIDcKOCA5IDMgMgowIDAgMCAw

11 9 2 3
7 8 3 2
10 15 3 7
8 9 3 2
0 0 0 0