All you have to do is say the next number after the person says. Example: If I say 1 the next person will say 2. so I wil start 1
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167