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functionalternatingCharacters($s){// Write your code here$checkAlphabet=$s[0];$initialLength=strlen($s);for($i=1;$i<strlen($s);$i++){if($s[$i]==$checkAlphabet){$s=substr($s,0,$i).substr($s,$i+1);$i--;}else{$checkAlphabet=$s[$i];}}return$initialLength-strlen($s);}
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Alternating Characters
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