I checked them using my AC algorithm

6
100110
000111
-> Impossible

10
1001100110
0101010101
-> 11111111112222222222

10
1001110000
0011111010
-> 11111211221212122222

11
01011100000
01111011001
-> 1111121112121212222222

14
10011111100101
00000110101010
-> 1111121212121111112222222222

18
100111111001010010
000001101010100111
-> 111112121212111111222222222222121112

18
100111111001010011
000001101010100011
-> Impossible