print("to add two no.")
a=int(input("Enter 1st no. ")
b=int(input("Enter 2nd no. ")
c=a+b
with open("tt.txt","a") as fp:
    fp.write("The result of addition of two numbers is ")
    fp.write(str(a)+"and"+str(b)+"is")
    fp.write(str(c))