c:\@Work\Perl\monks\Keystone>perl ask_to_replace_1.pl
string is now 'Three, Four, One, Two, xFive9, six, Seven'
sub-string 1 at offset 0 is 'Three'
is this correct? n
no: enter new string: Uno
sub-string 2 at offset 7 is 'Four'
is this correct? No
no: enter new string: Dos
sub-string 3 at offset 13 is 'One'
is this correct? y
sub-string 4 at offset 18 is 'Two'
is this correct? x
no: enter new string: Tres
sub-string 5 at offset 36 is 'Seven'
is this correct? n
no: enter new string: se7en
new string is 'Uno, Dos, One, Tres, xFive9, six, se7en'
done!