//////////////////////////////////////////////////////////////////////////
//  We'll say that a String is xy-balanced if for all the 'x' chars in the 
//  string, there is a 'y' char somewhere later in the string. So "xxy" is 
//  balanced, but "xyx" is not. 
//
//  Return true if the given string is xy-balanced. 
//
//  xyBalance("aaxbby") --> true
//  xyBalance("aaxbb")  --> false
//  xyBalance("yaaxbb") --> false
//
//  You'll need one of these include directives here when you submit this
//  to the Curator:
//
// #include <stdbool.h>    // if you're not using separate compilation 
// #include "xyBalance.h"  // if you are using separate compilation
//
bool xyBalance( const char *String ) {

	. . .	
}