- 1. Entrada, impresión y números
 - 2. Números enteros y flotantes
 - 3. Condiciones: if-then-else
 - 4. Para bucle con rango
 - 5. Instrumentos de cuerda
 - 6. While loop
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Ad place
                
            Bishop moves 
    
    
    
    
        Statement
        In chess, the bishop moves diagonally, any number of squares. Given two different squares of the chessboard, determine whether a bishop can go from the first to the second in one move.   The program receives as input four numbers from 1 to 8, specifying the column and row numbers of the starting square and the column and row numbers of the ending square. The program should output YES if a Bishop can go from the first square to the second in one move, or NO otherwise.  

        
        
        
        
        In all the problems input the data using input() and print the result using print().
        
        
            
        
    
            
                
                
            
        
Statement
In chess, the bishop moves diagonally, any number of squares. Given two different squares of the chessboard, determine whether a bishop can go from the first to the second in one move. The program receives as input four numbers from 1 to 8, specifying the column and row numbers of the starting square and the column and row numbers of the ending square. The program should output YES if a Bishop can go from the first square to the second in one move, or NO otherwise.  

In all the problems input the data using input() and print the result using print().