I have hundreds of files in a directory, named `File1`, `File2`, `File3`, ...,`File200`. Suppose I only have 3 files now, contents in these files are:

`File1`: (columns are separated by Tab)

```
[CITY]  [SCORE]
City1    110
City2    120
City3    130
City4    140

```

`File2`: (columns are separated by Tab)

```
[CITY]  [SCORE]
City1    210
City3    230
City4    240

```

`File3`: (columns are separated by Tab)

```
[CITY]  [SCORE]
City1    310
City5    350

```

Here the `[CITY]` column is an identifier, `[SCORE]` is a value term. I want to merge these files into one matrix based on the identifier column `[CITY]`, filling `NA` in missing cells,

`MergedMatrixFile`: (columns are separated by Tab)

```
[CITY]  File1    File2    File3
City1    110    210    310
City2    120    NA    NA
City3    130    230    NA
City4    140    240    NA
City5    NA    NA    350

```

How can I do this with `Bash`.