#include <iostream>
#include <fstream>
#include <string>
#include <sys/stat.h>

using namespace std;

// ???????? ????????????? ?????
bool fileExists(const string& filename) {
    struct stat buffer;
    return (stat(filename.c_str(), &buffer) == 0);
}

// ????????? ????? ????????? ????? ? ??????? ?????????? ?? ".out"
string getOutputFileName(const string& inputFileName) {
    size_t pos = inputFileName.find_last_of('.');
    if (pos == string::npos) { 
        // ???? ?????????? ???, ????????? .out
        return inputFileName + ".out";
    }
    return inputFileName.substr(0, pos) + ".out";  // ???????? ??????????
}

// ????????, ???????? ?? ?????? ?????? ??????????, ?????????? ??????
bool isSign(char c) {
    return (c == '!' || c == '?' || c == '.' || c == ',' || c == ';' || c == ':');
}

int main(int argc, char* argv[]) {
    if (argc != 3) {
        cerr << "Error: Missing arguments.\nUsage: " << argv[0] << " <inputfile> <symbol>\n";
        return -1;
    }

    string inputFileName = argv[1];
    char replacementSymbol = argv[2][0];

    if (!fileExists(inputFileName)) {
        cerr << "Error: Input file \"" << inputFileName << "\" does not exist.\n";
        return -1;
    }

    string outputFileName = getOutputFileName(inputFileName);

    ifstream inFile(inputFileName);
    if (!inFile) {
        cerr << "Error: Cannot open input file.\n";
        return -1;
    }

    ofstream outFile(outputFileName);
    if (!outFile) {
        cerr << "Error: Cannot create output file.\n";
        return -1;
    }

    int replaceCount = 0;
    char ch;
    while (inFile.get(ch)) {
        if (isSign(ch)) {
            ch = replacementSymbol;
            replaceCount++;
        }
        outFile.put(ch);
        if (!outFile) {
            cerr << "Error: Write error occurred.\n";
            return -1;
        }
    }

    inFile.close();
    outFile.close();

    cout << replaceCount << endl;  // ??????? ????? ?????
    return replaceCount;
}