FormattedNumber.java

importjava.util.*; 
importjava.io.*;

classMain {

publicstaticStringStringChallenge(Stringstr) {

Stringnewstr="";

for ( inti = 0 ; i < str.length() ; i++){

charletter = str.charAt(i);

if ( letter >= 'a' && letter <= 'z' || letter >= 'A' && letter <='Z'){

if ( isControl(newstr,letter)) newstr += letter;
 }
 }

returnnewstr.length() == 26 ? "true" : "false";

 }

publicstaticbooleanisControl (Stringstr, charx){

for (inti =0 ; i<str.length(); i++){
if(x==str.charAt(i)) returnfalse;
 }

returntrue;

 }

publicstaticvoidmain (String[] args) { 
// keep this function call here 
Scanners = newScanner(System.in);
System.out.print(StringChallenge(s.nextLine())); 
 }

}