Respuesta :
					                   there are only twenty four letters your can use (can 't have 1 or 0 as they look like 1 and 0) therefore the number of combinations is 10× 10x 10 x 24x24x24x=13824000 so therefore 10 different possible digits and 26 different possible letters
					                
					                
					              
			                   
					                   
					                  