function main(input){
  var count = 0;
  var length = 0;
  var one = 0;
  var inputS;
  var inputK;
  input = input.split('\n');
  inputS = input[0];
  inputK =  parseInt(input[1]);
  length = inputS.length;

  if(length == 1){
    for(var i=1;i<=inputK;i++){
      inputS = inputS + inputS;
    }
    length = length * inputK;
    one = 1;
  }
  
  for(var i=0;i<length-1;i++){
    if(inputS[i]==inputS[i+1]){
      count++;
      i++;
    }
  }
  
  if(inputK>=2 && one == 0){
    count = count * inputK;
    if(inputS[0]==inputS[length-1] && inputS[length-2] != inputS[length-1]){
      if(inputS[0]!=inputS[1] || (inputS[0] == inputS[1] && inputS[1] == inputS[2]))
      	count += inputK - 1; 
    }
  }

  console.log(count);
}

main(require("fs").readFileSync("/dev/stdin", "utf8"));