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syntatic analyzer 테스트

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Title
INPUT LINE
VALID/INVALID
통과
Open
cat
Valid
okay
Open
cat file1
Valid
okay
Open
cat file1 | grep main
Valid
okay
Open
cat file1 | cat
Valid
okay
Open
cat file2 | grep test | wc -l
Valid
okay
Open
cat file1 |
Invalid: Missing command name
okay
Open
| file1
Invalid: Missing command name
okay
Open
cat file1 | | wc -l
Invalid: Missing command name
okay