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A quartet with six instruments in it, would most likely be a sextet.
A sextet.
#include<stdio.h>
#include<conio.h>
#include<ctype.h>
main()
{
char string[80];
int n,k=0;
clrscr();
while((string[k]=getche())!='\r')
k++;
string[k]='\0';
n=k;
k=0;
while(k<n)
putchar(toupper(string[k]));
}
dont knw........