insert into flat values ('a2','a3');

insert into flat values ('a','a5');
insert into flat values ('a6','a7');

insert into flat values ('a8','a9');
insert into flat values ('a10','a11');
insert into flat values ('a12','a13');
insert into flat values ('a14','a15');

insert into flat values ('a16','a17');
insert into flat values ('a18','a19');
insert into flat values ('a20','a21');
insert into flat values ('a22','a23');
insert into flat values ('a24','a25');
insert into flat values ('a26','a27');
insert into flat values ('a28','a29');
insert into flat values ('a30','a31');

insert into flat values ('a32','a33');
insert into flat values ('a34','a35');
insert into flat values ('a36','a37');
insert into flat values ('a38','a39');
insert into flat values ('a40','a41');
insert into flat values ('a42','a43');
insert into flat values ('a44','a45');
insert into flat values ('a46','a47');
insert into flat values ('a48','a49');
insert into flat values ('a50','a51');
insert into flat values ('a52','a53');
insert into flat values ('a54','a55');
insert into flat values ('a56','a57');
insert into flat values ('a58','a59');
insert into flat values ('a60','a61');
insert into flat values ('a62','a63');
