First numbers that belong to both sets:
1,
8,
69,
96,
101,
181,
818,
6969,
9696,
10101,
18181,
81018,
81818,
696969,
969696,
1010101,
1018101,
1810181,
1818181,
8101018,
8181818,
69696969,
96969696,
101010101,
101818101,
181010181,
181818181,
810101018,
810181018,
818101818,
818181818.