def maximum (value1, value2, value3):
    max_value = value1
    if value2 > max_value:
        max_value = value2
    if value3 > max_value:
        max_value = value3
    return max_value
  
maximum (12,27,36)
  
max (12, 27, 36)
  
min(15, 9, 27, 14) 
