def add (P,Q):
    return P+Q
def subtract(P,Q):
    return P-Q
def multiply (P,Q):
    return P*Q
def divide(p,Q):
    return P/Q
print("Please select the operation")
print("a.Add\nb.Subtract\nc.Multiply\nd.Divide")
choice= input("Please enter your choice(a/b/c/d):")
num_1= int(input("Enter the first number:"))
num_2= int(input("Enter the second number:"))
if choice =="a":
    print(num_1,"+", num_2,"=",add(num_1,num_2))
elif choice =="b":
    print(num_1,"-", num_2,"=",subtract(num_1,num_2))
elif choice =="c":
    print(num_1,"*", num_2,"=",multiply(num_1,num_2))
elif choice =="d":
    print(num_1,"/", num_2,"=",divide(num_1,num_2))
else:
    print("Invalid Input!")