[Question]
Input: ( [ < < { } > > ]

[Answer]
)

[Question]
Input: [ [ < [ [ ] ] > ] ] { } { ( { ( ( ) ) ( ) { { [ [ ( { < { [ { [ ( < ( ( < < < [ ( ) ] [ ] > > > ) ) > < [ < { < ( ) > } > ] > ) ] } ] } > ( ( ) ) } ) [ ( ) ] ] ( < > ) ] } } } ) } [

[Answer]
]

[Question]
Input: ( { { } }

[Answer]
)

