awk command for printing all the repeated matching lines without making them unique

awk command for printing all the repeated matching lines without making them unique

2

I have two files file1 file2 which has taxonomy details .

for example

file1 : ( it has taxonomy ID – some digit)

9

9

4

4

4

file2 : ( it has other taxonomy details along with taxonomy ID )

9 A B C D

4 P Q R S

I want to get an output like
output :

9 A B C D

9 A B C D

4 P Q R S

4 P Q R S

4 P Q R S

I tried using this command

awk -F ‘t’ ‘NR==FNR{a[$1];next} ($1) in a’ file1 file2


awk

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