ERROR: ImpossibleKeyCheck - input.hack:7:9 - Type vec<string> never has key 's'
ERROR: ImpossibleKeyCheck - input.hack:11:9 - Type vec<string> never has key 't'
ERROR: ImpossibleKeyCheck - input.hack:24:9 - Type dict<string, string> never has key 1
ERROR: ImpossibleKeyCheck - input.hack:28:9 - Type dict<string, string> never has key 2