public class Combinations
{
	public void findResult(char[] record, String output, int n, int size)
	{
		if (output.length() > 0)
		{
			// Display output
			System.out.println(output);
		}
		if (n == 0)
		{
			return;
		}
		for (int i = 0; i < size; ++i)
		{
			// Find result using recursion
			findResult(record, output + record[i], n - 1, size);
		}
	}
	public static void main(String[] args)
	{
		Combinations task = new Combinations();
		// Character element
		char[] record = {
			'A' , 'T' , 'M' , '@' , '$'
		};
		// Get number of element in record set
		int size = record.length;
		// Length of generated string
		int n = 3;
		task.findResult(record, "", n, size);
	}
}