#include <stdio.h>
#include <stdlib.h>

int n;
struct rect {
	int x;
	int y;
	rect* LP;
	rect* HD;
};

void minbodLP (rect* bod, rect* pole) {
	int ins = -1;
	int pom = 20001;
	int i,c,a,b;
	for (i =0;i<n;i++)
		if(((pole[i].y) == (bod->y)) && ((pole[i].x) != (bod->x)) && ((pole[i].LP) == NULL)) {
			a = pole[i].x;
			b = bod->x;
			c = abs(a-b);
			if (c < pom) {
				ins = i;
				pom = c;
			}
		}
	bod->LP = &pole[ins];
	pole[ins].LP = bod;
}

void minbodHD (rect* bod, rect* pole) {
	int ins = -1;
	int pom = 20001;
	int i,c,a,b;
	for (i =0;i<n;i++)
		if(((pole[i].x) == (bod->x)) && ((pole[i].y) != (bod->y)) && (pole[i].HD == NULL)) {
			a = pole[i].y;
			b = bod->y;
			c = abs(a-b);
			if (c < pom) {
				ins = i;
				pom = c;
			}
		}
	bod->HD = &pole[ins];
	pole[ins].HD = bod;
}

int main() {
	rect* bod;
	rect* pombod;
	int i,j,minx,maxx,miny,maxy;
	bool h;
	minx = miny = 10001;
	maxx = maxy = -10001;
	scanf("%d\n",&n);
	while (n!=0) {
		bod = new struct rect[n];
		for (i = 0;i < n;i++) {
			scanf ("%d %d\n",&(bod[i].x),&(bod[i].y));
			bod[i].HD = bod[i].LP = NULL;
			if (bod[i].x < minx)
				minx = bod[i].x;
			if (bod[i].x > maxx)
				maxx = bod[i].x;
			if (bod[i].y < miny)
				miny = bod[i].y;
			if (bod[i].y > maxy)
				maxy = bod[i].y;
		}
		
		for (i=minx; i<maxx; i++) {
			for (j=0;j<n;j++) {
				if ((bod[j].x == i) && (bod[j].LP == NULL))
					minbodLP (&bod[j],bod);
			}
		}
		for (i=miny; i<maxy; i++) {
			for (j=0;j<n;j++) {
				if ((bod[j].y == i) && (bod[j].HD == NULL))
					minbodHD (&bod[j],bod);
			}
		}
		
		pombod = bod;
		for (i =1;i <n;i++) {
			if((bod[i].x < pombod->x)||((bod[i].x == pombod->x) && bod[i].y < pombod->y))
				pombod = &(bod[i]);
		}
		h = true;
		while (pombod != bod)
		{
			if (h)
				pombod = pombod->HD;
			else
				pombod = pombod->LP;
			h = !h;
		}

		do {
			if(h) {
				if (pombod->y < (pombod->HD)->y)
					printf("N");
				else
					printf("S");
				pombod = pombod->HD;
			} else {
				if (pombod->x < (pombod->LP)->x)
					printf("E");
				else
					printf("W");
				pombod = pombod->LP;
			}
			h = !h;
		} while (pombod != bod);
		printf("\n");
		delete [] bod;
		scanf("\n%d\n",&n);
	}
	return 0;
}