a = ['asdf','qwer']
b = ['jl','asdf','sfsdf','qwer','joiji']

def mass(a,b):
	k = 0
	for i in a:
		if i in b:
			k = 1
		else:
			return 0
	return k

result = not (set(a)-set(b))

result = not set(a).difference(b)

>>> a = ['asdf','qwer']
>>> b = ['jl','asdf','sfsdf','qwer','joiji']
>>> set(a).issubset(b)
True
>>>

>>> a = ['asdf','qwer']
>>> b = ['jl','asdf','sfsdf','qwer','joiji']
>>> set(a) < set(b)
True
>>>