СРОЧНО !!!! 20 балов Какой цифрой оканчивается разность:

1⋅2⋅3⋅ … ⋅18⋅19−1⋅3⋅5⋅7⋅ … ⋅17⋅19
1
⋅
2
⋅
3
⋅

…

⋅
18
⋅
19
−
1
⋅
3
⋅
5
⋅
7
⋅

…

⋅
17
⋅
19
?