#include<stdio.h>
#include<string.h>
int main(void) {
	char a[20200], b[101], maxT[101] = "", minT[101] = "";
	int i = 0, j = 0;
	int max = -1, min = 101, newLen;
	int f = 0;  //f=0表示当前遇到的分隔符（空格或逗号）是新单词前的分隔符 

	gets(a);
	while (a[i] != '\0') {  //扫描a串生成一个新的单词，然后测其长度，再与max,min对比 
		if (a[i] == ' ' || a[i] == ',') {
			if (f == 1) {   //f=1表示当前遇到的分隔符前面有一个刚刚扫描形成的单词 
				b[j] = '\0';
				newLen = strlen(b);
				if (newLen > max) {
					max = newLen;
					strcpy(maxT, b);
				}
				if (newLen < min) {
					min = newLen;
					strcpy(minT, b);
				}
				f = 0;
				j = 0;
			}
		}
		else {
			b[j] = a[i];
			j++;
			f = 1;  //开始或是正在构造一个单词 
		}
		i++;
	}
	//处理末尾单词 
	b[j] = '\0';
	newLen = strlen(b);
	if (newLen > max) {
		max = newLen;
		strcpy(maxT, b);
	}
	if (newLen < min) {
		min = newLen;
		strcpy(minT, b);
	}
	printf("%s\n%s\n", maxT, minT);
	return 0;
}