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publicstaticintgemstones(List<String>arr){// Write your code hereStringalphabetsStr="abcdefghijklmnopqrstuvwxyz";intcount=alphabetsStr.length();for(Characterc:alphabetsStr.toCharArray()){intflag=0;for(Strings:arr){if(!s.contains(String.valueOf(c))){flag=1;break;}}if(flag==1)count--;}returncount;}
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Gemstones
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Java Code: