'def sum(ab,bc):
    cd = ab + bc
    return cd

ab = 5
bc = 6

som(ab,bc)
print(cd)'

def diff (x,y):
    ef = x - y
    return ef

diff(cd,3)'

def sum(ab,bc):
    cd = ab + bc
    return cd

ab = 5
bc = 6

res=sum(ab,bc)
print(res)'

def sum(a,b):

    ret = a+b
    print ret
    return ret