package JavaPatterns;
/** *
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@author Archit Garg */ import java.util.Scanner; public class AlphaNumeric { public static void main(String args[]){ Scanner s = new Scanner(System.in); int n = s.nextInt(); int i = 1; while (i<=n){ int j = 1; while(j<=i){ System.out.print((char)('A'+i-1)); j++; } System.out.println( ); i++; }
} }