Tried to pass multiple conf file not working

I. had passed as below to Logstash. It is not taking.

I. have to pass multiple input files. to Logstash , so I had created multiple conf files as below
-------I. passed like below
bin/logstash -f logstash-filter*.conf

bin/logstash -f logstash-filter10.conf -f logstash-filter11.conf. -f logstash-filter12.conf. -f logstash-filter13.conf
----------------logstash-filter*.conf like below
input {

file {
path => "/Users/krishna/Elastic-kibana-logstash/logstash-6.3.0/input/Autosys-Logs.txt"
start_position => "beginning"
type => "apache"
}

}

output {
elasticsearch { hosts => ["localhost:9200"]
index => "elasticlog-demo"
}
stdout { codec => rubydebug }
}
.

If you have multiple config files put them in a directory and pass the path to that directory via -f.

I had tried. as below by putting multiple config files in folder and passing folder with -f option. It throws error.
----------I passed like this
bin/logstash -f fileconfig

[2018-07-03T15:38:42,953][ERROR][logstash.agent ] Failed to execute action {:action=>LogStash::PipelineAction::Create/pipeline_id:main, :exception=>"LogStash::ConfigurationError", :message=>"Expected one of #, input, filter, output at line 33, column 1 (byte 688) after ", :backtrace=>["/Users/krishna/Elastic-kibana-logstash/logsta

That indicates that one or more files in the directory is invalid.

my two files in the folder are as below
input {

  file {
      path => "/Users/krishna/Elastic-kibana-logstash/logstash-6.3.0/input/Storm_supervisor-Logs.csv"
      start_position => "beginning"
      type => "apache"
   }

}
filter {

  grok {
        match => {
                  "message" => "%{WORD:ERROR} "
                }
      }

   }

output {
elasticsearch { hosts => ["localhost:9200"]
index => "elasticlog-demo"
}
stdout { codec => rubydebug }
}
--------another file
nput {
file {
path => "/Users/krishna/Elastic-kibana-logstash/logstash-6.3.0/input/ETL-Logs.txt"
start_position => "begining"
type => "apache"
}
}
}

output {
elasticsearch { hosts => ["localhost:9200"]
index => "elasticlog-demo"
}
stdout { codec => rubydebug }
}

I had shown my conf files in folder. Is there a way to put two input csv files in a single .conf file ? I could not do so. So I put two .conf files in folder and passed folder nam as input

Logstash merges all configuration files found in a directory. It doesn't matter if you have all your inputs, filters, and output in a single file or if you split them in multiple files.

In your case, keep in mind that you have to elasticsearch outputs so you'll send all documents to ES twice.