I have forgotten my 5-character computer password, but I know that it consists of the letters $\mathrm { a } , \mathrm { b } , \mathrm { c } , \mathrm { d } , \mathrm { e }$ in some order. When I enter a potential password into the computer, it tells me exactly how many of the letters are in the correct position. When I enter abcde, it tells me that none of the letters are in the correct position. The same happens when I enter cdbea and eadbc. Using the best strategy, how many further attempts must I make in order to guarantee that I can deduce the correct password? A None: I can deduce it immediately B One C Two D Three E More than three
& E
I have forgotten my 5-character computer password, but I know that it consists of the letters $\mathrm { a } , \mathrm { b } , \mathrm { c } , \mathrm { d } , \mathrm { e }$ in some order. When I enter a potential password into the computer, it tells me exactly how many of the letters are in the correct position.
When I enter abcde, it tells me that none of the letters are in the correct position. The same happens when I enter cdbea and eadbc.
Using the best strategy, how many further attempts must I make in order to guarantee that I can deduce the correct password?
A None: I can deduce it immediately
B One
C Two
D Three
E More than three