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开放源码的编译器open watcom 1.6.0版的源代码

input:
    IA  '1'
    IB  '2'
    IC  '3';

output:
    OA  '5'
    OB  '6'
    OC  '7';

rules
x:
    [
    | IA:
        .OB
    ]
;

testing::
    [
    | IB:
        .OC
    ]
;