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select replace( replace( replace(r, 'X', chr(27)||'[42m'||chr(27)||'[1;'||to_char(32)||'m'||'X'||chr(27)||'[0m'), 'T',chr(27)||'[43m'||chr(27)||'[1;'||to_char(33)||'m'||'T'||chr(27)||'[0m'), '@',chr(27)||'[33m'||chr(27)||'[1;'||to_char(31)||'m'||'@'||chr(27)||'[0m') from ( select lpad(' ',20-e-i)|| case when dbms_random.value < 0.3 then substr(s,1,e*2-3+i*2) else substr(substr(s,1,dbms_random.value(1,e*2-3+i*2-1))||'@'||s,1,e*2-3+i*2) end r from ( select rpad('X',40,'X') s,rpad('T',40,'T') t from dual ), ( select level i, level+2 hop from dual connect by level<= 4), lateral ( select level e from dual connect by level<=hop) union all select lpad(' ',17)||substr(t,1,3) from ( select rpad('X',40,'X') s, rpad('T',40,'T') t from dual ) connect by level<=5)