JSFiddle - React, Tailwind, and code Playground

HTML

<button id="execB">execB</button>
	<ul class="myUl">
        <li>(UK/IRE, POL)</li>
        <li>(UK/IRE)</li>
        <li>(POL)</li>
        <li>(SAN)</li>
        <li>(GER, POL)</li>
        <li>(GER)</li>
        <li>(SAN, UK/IRE)</li>
    </ul>
    
    <div id="gerDiv" class="holders"><p>german div:</p><ul></ul></div>
    <div id="ukDiv" class="holders"><p>uk/ire div:</p><ul></ul></div>
    <div id="polDiv" class="holders"><p>pol div:</p><ul></ul></div>
    <div id="sanDiv" class="holders"><p>san div:</p><ul></ul></div>

CSS

.holders{
        
        background: gray;
        width: 100px;
        height: 200px;
        margin-left: 15px;
        margin-bottom: 15px;
        float: left;
    }

JavaScript

$(document).ready(function(){
        
        $('#execB').click(function(){
        
        		var polStr = "";
            var ukStr = "";
            var gerStr = "";
            var sanStr = "";
        
            $('.myUl li').each(function(){
                
                var liText = $(this).text().toLowerCase();
                var newliText = liText.replace(/[{()}]/g, "");
                var textArray = newliText.split(/[,]/);
                console.log(textArray);

                $(textArray).each(function(index){
                        switch(true){
                            case (textArray[index].indexOf('pol') != -1):
                            		polStr = polStr + liText+"<br>";
                                break;    
                            case (textArray[index].indexOf('uk') != -1)
                            			|| (textArray[index].indexOf('ire') != -1):   
                            		ukStr = ukStr + liText+"<br>";
                                break;
                            case (textArray[index].indexOf('ger') != -1):
                            		gerStr = gerStr + liText+"<br>";
                                break;
                            case (textArray[index].indexOf('san') != -1):
                            		sanStr = sanStr + liText+"<br>";
                                break;        
                        }
                    
                });
            });
            
            
        		if (polStr) {
            	$('#polDiv').append(polStr+"<br>");
            } 
            
            if (ukStr) {
            	$('#ukDiv').append(ukStr+"<br>");
            } 
            
            if (gerStr) {
            	$('#gerDiv').append(gerStr+"<br>");
            } 
            
            if (sanStr) {
            	$('#sanDiv').append(sanStr+"<br>");
            } 
            
            
        });
    });