/INPUT=file-spec

    Specifies an input DCL command procedure containing one or more
    DCL commands to be executed by the spawned subprocess. The
    default file type is .COM. If you specify a DCL command string
    with the SPAWN command and an input file with /INPUT, the command
    string is processed before the input file. After processing
    of the input file is complete, the subprocess is terminated.
    Do not use the asterisk (*)  wildcard character in the file
    specification.