Reasons not to leave a DOS window open with the young'uns around

C:\Users>;]OP['-p{

']OP['-p{' is not recognized as an internal or external command,

operable program or batch file.

C:\Users>

C:\Users>;]OP['-p{'

']OP['-p{'' is not recognized as an internal or external command,

operable program or batch file.

C:\Users>;]OP['-p{?

']OP['-p{?' is not recognized as an internal or external command,

operable program or batch file.

C:\Users>"{?+