Data input format

Data output format

Examples

Data input

Data output

userLogin\n

userPassword\n

.\n

nameOfField1 valueOfField1\n

nameOfField2 valueOfField2\n

…

nameOfFieldN valueOfFieldN\n

.\n

Successful operating system login.

John

123456

userID1

Operating system login error.

hacker

password

ERROR wrong login or password