Redirecting the input of two commands via pipe operator in Bash

I have not learned Bash in a formal way so please do give me suggestions for a more descriptive question title. Instead of creating a temporary file whose lifespan is limited to that of the command it is used by (in this case, `command`), as in: ``` zcat input.txt.gz > input.txt command input.txt rm input.txt ``` we can avoid it as follows: ``` zcat input.txt.gz | command - ``` Now my question is whether this is possible with two inputs. I wish to avoid creating two temporary files, as in: ``` zcat input1.txt.gz > input1.txt zcat input2.txt.gz > input2.txt command input1.txt input2.txt rm input1.txt input2.txt ``` I am guessing that the following solution can remove the need to create one of the two temporary files, as: ``` zcat input1.txt.gz > input1.txt zcat input2.txt.gz | command input1.txt - rm input1.txt ``` but I wonder if there is a way to completely avoid creating the temporary file. I hope my question was clear enough. Though I used `zcat` as an example, the solution I am looking for should be more general. Thanks in advance.