

leftover_list = []
def number_needed(a,b):
	a = str(a).lower()
	b = str(b).lower()
	for char in a:
		if char not in b:
			leftover_list.append(char)
	for char in b:
		if char not in a:
			leftover_list.append(char)
	print(len(leftover_list))

number_needed("abc","cde")
	
4f9fb31f62a3379dc85e203d2e4efdd778f50cc1
<mask token>

<mask token>


def number_needed(a, b):
    a = str(a).lower()
    b = str(b).lower()
    for char in a:
        if char not in b:
            leftover_list.append(char)
    for char in b:
        if char not in a:
            leftover_list.append(char)
    print(len(leftover_list))


<mask token>

<mask token>


def number_needed(a, b):
    a = str(a).lower()
    b = str(b).lower()
    for char in a:
        if char not in b:
            leftover_list.append(char)
    for char in b:
        if char not in a:
            leftover_list.append(char)
    print(len(leftover_list))


number_needed('abc', 'cde')

leftover_list = []


def number_needed(a, b):
    a = str(a).lower()
    b = str(b).lower()
    for char in a:
        if char not in b:
            leftover_list.append(char)
    for char in b:
        if char not in a:
            leftover_list.append(char)
    print(len(leftover_list))


number_needed('abc', 'cde')



leftover_list = []
def number_needed(a,b):
	a = str(a).lower()
	b = str(b).lower()
	for char in a:
		if char not in b:
			leftover_list.append(char)
	for char in b:
		if char not in a:
			leftover_list.append(char)
	print(len(leftover_list))

number_needed("abc","cde")
	