What is wrong with these PL/SQL codes?

Question

DECLARE
CURSOR C_All_Tables IS select table_name from user_tables where substr(table_name,1,1)='B';
BEGIN
For cnt1 in C_All_Tables Loop
Declare
CURSOR C_EachTable IS select NAME from cnt1.table_name;
V_Result varchar2(20);
Begin
for cnt2 in C_EachTable Loop
V_Result := substr(cnt2.name,1,3);
EXIT when substr(cnt2.name,1,3) = 'K01' ;
if V_Result != 'K01' then
     delete from cnt1.table_name where substr(NAME,1,3)=V_result;
     end if;
end loop;
End;
End Loop;
Commit;
END;
Here is the errors
Error report:
ORA-06550: line 8, column 56:
PL/SQL: ORA-00942: table or view does not exist
ORA-06550: line 8, column 34:
PL/SQL: SQL Statement ignored
ORA-06550: line 12, column 43:
PLS-00364: loop index variable 'CNT2' use is invalid
ORA-06550: line 12, column 24:
PL/SQL: Statement ignored
ORA-06550: line 13, column 40:
PLS-00364: loop index variable 'CNT2' use is invalid
ORA-06550: line 13, column 23:
PL/SQL: Statement ignored
ORA-06550: line 15, column 37:
PL/SQL: ORA-00942: table or view does not exist
ORA-06550: line 15, column 19:
PL/SQL: SQL Statement ignored
06550. 00000 - "line %s, column %s:\n%s"
*Cause:    Usually a PL/SQL compilation error.
*Action:
Could someone help me fix it. Thanks so much.

Answer 1

something like this maybe?
begin
    for c in (select table_name from user_tables where substr(table_name,1,1)='B' order by substr(table_name,1,3) ) loop
        EXIT when substr(c.table_name,1,3) = 'K01';
       execute immediate  ('delete from '||c.table_name||' where substr('||c.table_name||',1,3)= substr('||c.table_name||',1,3)');
    end loop;
end;