function a_plus_b(form) {
a=eval(form.num1.value)
b=eval(form.num2.value)
c=eval(form.num3.value)
d=eval(form.num4.value)
e=eval(form.num5.value)
f=eval(form.num6.value)
g=eval(form.num7.value)
h=eval(form.num8.value)
i=eval(form.num9.value)
j=eval(form.num10.value)
k=eval(form.num11.value)
l=eval(form.num12.value)
m=eval(form.num13.value)
n=eval(form.num14.value)
o=eval(form.num15.value)
p=eval(form.num16.value)
q=eval(form.num17.value)
r=eval(form.num18.value)
s=eval(form.num19.value)
t=eval(form.num20.value)
u=eval(form.num21.value)
v=eval(form.num22.value)
w=eval(form.num23.value)
x=eval(form.num24.value)
y=eval(form.num25.value)
z=eval(form.num26.value)
aa=eval(form.num27.value)
bb=eval(form.num28.value)
cc=eval(form.num29.value)
dd=eval(form.num30.value)
ee=eval(form.num31.value)
ff=eval(form.num32.value)
gg=eval(form.num33.value)
hh=eval(form.num34.value)
ii=eval(form.num35.value)
jj=eval(form.num36.value)



kk=a+b+c+d+e+f+g+h+i+j+k+l+m+n+o+p+q+r+s+t+u+v+w+x+y+z+aa+bb+cc+dd+ee+ff+gg+hh+ii+jj
form.Input.value = kk
}