part of my assignment is, to write a script 'C shell' to accept any user ID. containing the any of the following characters ' y r e w q s ' in any position of the user ID. So far I have the easy part done. Now I need to search the user's ID for one of the characters above and if it contains one accept the ID. prempt: onintr interrupt echo "Welcome to the UNIX O/S." set password = y echo -n "Enter your password: " set code = `head -1` while ("$password" != "$code") echo "Wrong password." echo -n "Enter your password again: " set code = `head -1` end echo "correct password" exit 0 interrupt: echo "Do not try to terminate by pressing ^c!" goto prempt If anyone is able to sugest a solution I would be very greatful.