839990_0_0_2513.c: In function `main':
839990_0_0_2513.c:1: error: `A' undeclared (first use in this function)
839990_0_0_2513.c:1: error: (Each undeclared identifier is reported only once
839990_0_0_2513.c:1: error: for each function it appears in.)
839990_0_0_2513.c:1: error: `B' undeclared (first use in this function)
839990_0_0_2513.c:1: error: syntax error before ')' token
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