user
Instruction
Answer the question based on the provided table.


Table
Table Title: second sources from europe and eastern bloc
Table Content:
<table border="1" cellspacing="0">
<tr> <td> none </td> <td colspan="2"> soviet union </td> <td colspan="3"> czechoslovakia </td> <td colspan="3"> poland </td> <td colspan="2"> east germany </td> </tr>
<tr> <td> none </td> <td> 5400 </td> <td> 7400 </td> <td> 5400 </td> <td> 7400 </td> <td> 8400 </td> <td> 5400 </td> <td> 6400 </td> <td> 7400 </td> <td> 7400 </td> <td> 8400 </td> </tr>
<tr> <td> 74 </td> <td> 133 </td> <td> к155 </td> <td> mh54 </td> <td> mh74 </td> <td> mh84 </td> <td> uca54 </td> <td> uca64 </td> <td> ucy74 </td> <td> d1 </td> <td> e1 </td> </tr>
<tr> <td> 74l </td> <td> 134 </td> <td> кр134 </td> <td> none </td> <td> none </td> <td> none </td> <td> none </td> <td> none </td> <td> none </td> <td> none </td> <td> none </td> </tr>
<tr> <td> 74h </td> <td> 130 </td> <td> к131 </td> <td> none </td> <td> none </td> <td> none </td> <td> none </td> <td> uca64h </td> <td> ucy74h </td> <td> d2 </td> <td> e2 </td> </tr>
<tr> <td> 74s </td> <td> 530 </td> <td> кр531 </td> <td> mh54s </td> <td> mh74s </td> <td> mh84s </td> <td> none </td> <td> none </td> <td> ucy74s </td> <td> ds </td> <td> none </td> </tr>
<tr> <td> 74ls </td> <td> 533 </td> <td> к555 </td> <td> none </td> <td> none </td> <td> none </td> <td> none </td> <td> none </td> <td> ucy74ls </td> <td> dl </td> <td> none </td> </tr>
<tr> <td> 74as </td> <td> 1530 </td> <td> кр1530 </td> <td> none </td> <td> none </td> <td> none </td> <td> none </td> <td> none </td> <td> none </td> <td> none </td> <td> none </td> </tr>
<tr> <td> 74als </td> <td> 1533 </td> <td> кр1533 </td> <td> mh54als </td> <td> mh74als </td> <td> none </td> <td> none </td> <td> none </td> <td> none </td> <td> none </td> <td> none </td> </tr>
<tr> <td> 74f </td> <td> 1531 </td> <td> кр1531 </td> <td> none </td> <td> none </td> <td> none </td> <td> none </td> <td> none </td> <td> none </td> <td> none </td> <td> none </td> </tr>
<tr> <td> 74hc </td> <td> 1564 </td> <td> кр1564 </td> <td> none </td> <td> none </td> <td> none </td> <td> none </td> <td> none </td> <td> none </td> <td> none </td> <td> none </td> </tr>
<tr> <td> 74hct </td> <td> none </td> <td> none </td> <td> none </td> <td> none </td> <td> none </td> <td> none </td> <td> none </td> <td> none </td> <td> u74hct </td> <td> none </td> </tr>
<tr> <td> 74ac </td> <td> 1554 </td> <td> кр1554 </td> <td> none </td> <td> none </td> <td> none </td> <td> none </td> <td> none </td> <td> none </td> <td> none </td> <td> none </td> </tr>
<tr> <td> 74act </td> <td> 1594 </td> <td> кр1594 </td> <td> none </td> <td> none </td> <td> none </td> <td> none </td> <td> none </td> <td> none </td> <td> none </td> <td> none </td> </tr>
<tr> <td> 74lvc </td> <td> 5574 </td> <td> none </td> <td> none </td> <td> none </td> <td> none </td> <td> none </td> <td> none </td> <td> none </td> <td> none </td> <td> none </td> </tr>
<tr> <td> 74vhc </td> <td> 5584 </td> <td> none </td> <td> none </td> <td> none </td> <td> none </td> <td> none </td> <td> none </td> <td> none </td> <td> none </td> <td> none </td> </tr>
</table>


Question
which country used uca for the 5400 and 6400 series and ucy for the 7400 series.


Answer Format
The final answer should be concise and use the following format:
```json
{
    "answer": [
        "answer1",
        "answer2",
        ...
    ]
}
```
rule
["poland"]