#include <stdio.h>

int main(){
	int height,val;
	scanf("%d%d",&height,&val);
	
	int student[val];
	for(int i = 0;i < val - 1;i ++){
		scanf("%d",&student[i]);
	}
	// ソート（降順）
	for(int i = 0;i < val - 1;i ++){
		for(int j = 0;j < val - 1;j ++){
			if(student[i] > student[j]){
				int tmp = student[i];
				student[i] = student[j];
				student[j] = tmp;
			}
		}
	}
	int rank = 0;
	for(int i = 0;i < val - 1;i ++){
		if(student[i] < height){
			rank = i + 1;  
		}
	}
	if(rank == 1){
		printf("%dst",rank);
	}else if(rank == 2){
		printf("%dnd",rank);
	}else if(rank == 3){
		printf("%drd",rank);
	}else{
		printf("%dth",rank);
	}
}