#include<stdio.h>
#include<unistd.h>
#include<ctype.h>

int main(){
	char space[4096];
	ssize_t readlen;


	// top of loop here
	while(1){
		// read up to 4096 bytes
		readlen = read(0, space, 4096);
		if(readlen < 1)
			break;

		// Capitalize the letters in space
		int pos = 0;
		while(pos < readlen){
			if(isalpha(space[pos]))    // Don't need a colon here
				space[pos] = toupper(space[pos]);
			pos++; // Same as pos += 1
		}

		// Write out up to 4096 bytes
		write(1, space, readlen);

		// end of the loop
	}
	return 0;
}