gistfile1.txt

        __block NSUInteger outerIndex = -1;
        
        [lista enumerateObjectsUsingBlock:^(NSString *word, NSUInteger idx, BOOL *stop) {
            
            __block NSUInteger innerIndex = -1;
            [datos enumerateObjectsUsingBlock:^(NSString *palabra, NSUInteger indice, BOOL *parada) {
                
                if ([word isEqualToString:palabra]) {
                    NSLog(@"log1: coinciden el %d", indice); //(log1) si pongo este log deja de aparecer el log3
                    innerIndex = idx;
                    *parada = YES;
                }
                
            }];
            if (innerIndex!=-1) outerIndex = innerIndex;
            NSLog(@"log2: vamos por %@", word); // (log2) si pongo este log dejan de aparecer log3 y log1
            
        }];
        NSLog(@"log3: You've stopped at index %i by word [%@]",outerIndex, lista[outerIndex]); // (log3)