foo.c:1:1: error: unknown type name 'mn'
    1 | mn kjl.8ol
      | ^~
foo.c:1:7: error: invalid suffix "ol" on floating constant
    1 | mn kjl.8ol
      |       ^~~~
foo.c:1:7: error: expected '=', ',', ';', 'asm' or '__attribute__' before numeric constant

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