First numbers that belong to both sets:
121,
242,
363,
484,
1001,
1111,
1221,
1331,
1441,
1551,
1661,
1771,
1881,
1991,
2002,
2112,
2222,
2332,
2442,
2552,
2662,
2772,
2882,
2992,
3003,
3333,
3663,
3993,
4004,
4224,
4444,
4664,
4884,
5005,
5115,
5225,
5335,
5445,
5555,
5665,
5775,
5885,
5995,
6006,
6336,
6666,
6996,
7007,
7777,
8008,
8448,
8888,
9009,
9999,
10901,
11011,
12221,
13431,
14641,
15851,
17171,
18381,
19591,
20702,
21912,
22022,
23232,
24442,
25652,
26862,
28182,
29392,
31713,
33033,
36663,
40304,
42724,
44044,
46464,
48884,
50105,
51315,
52525,
53735,
54945,
55055,
56265,
57475,
58685,
59895,
61116,
64746,
66066,
69696,
77077,
80608,
86768,
88088,
94149,
99099,
100001,
101101,
102201,
103301,
104401,
105501,
106601,
107701,
108801,
109901,
110011,
111111,
112211,
113311,
114411,
115511,
116611,
117711,
118811,
119911,
120021,
121121,
122221,
123321,
124421,
125521,
126621,
127721,
128821,
129921,
130031,
131131,
132231,
133331,
134431,
135531,
136631,
137731,
138831,
139931,
140041,
141141,
142241,
143341,
144441,
145541,
146641,
147741,
148841,
149941,
150051,
151151,
152251,
153351,
154451,
155551,
156651,
157751,
158851,
159951,
160061,
161161,
162261,
163361,
164461,
165561,
166661,
167761,
168861,
169961,
170071,
171171,
172271,
173371,
174471,
175571,
176671,
177771,
178871,
179971,
180081,
181181,
182281,
183381,
184481,
185581,
186681,
187781,
188881,
189981,
190091,
191191,
192291,
193391,
194491,
195591,
196691,
197791,
198891,
199991,
200002,
201102,
202202,
203302,
204402,
205502,
206602,
207702,
208802,
209902,
210012,
211112,
212212,
213312,
214412,
215512,
216612,
217712,
218812,
219912,
220022,
221122,
222222,
223322,
224422,
225522,
226622,
227722,
228822,
229922,
230032,
231132,
232232,
233332,
234432,
235532,
236632,
237732,
238832,
239932,
240042,
241142,
242242,
243342,
244442,
245542,
246642,
247742,
248842,
249942,
250052,
251152,
252252,
253352,
254452,
255552,
256652,
257752,
258852,
259952,
260062,
261162,
262262,
263362,
264462,
265562,
266662,
267762,
268862,
269962,
270072,
271172,
272272,
273372,
274472,
275572,
276672,
277772,
278872,
279972.
Some larger examples :
99846964899,
99851815899,
99856765899,
99861616899,
99866566899,
99871417899,
99876367899,
99881218899,
99886168899,
99891019899,
99945954999,
99950805999,
99955755999,
99960606999,
99965556999,
99970407999,
99975357999,
99980208999,
99985158999,
99990009999.