while(line=readline()){
    var lines = line.split("");
    var count = 0;
    var arr = [];
    for(var i =0; i < lines.length; i++){
        if (arr.indexOf(lines[i])  < 0 && count < 3){
            arr.push(lines[i]);
            count++;
        }else if(count >= 3) {
            console.log(0)
            break;
        }
    }
    if (arr.length === 2){
        console.log(2);
    } else if(arr.length === 1){
        console.log(1);
    }
}

var readline = require('readline');
var rl = readline.createInterface({
    input: process.stdin,
    output: process.stdout
});
rl.on('line', function(line){
    var lines = line.split("");
    var result = 0;
    var pointer = -2;
    var tempresult = 0;
    for(var i = 0, len = lines.length; i < len; i++){
        if (line[i] != line[i+1]){
            pointer = i;
            tempresult++;
        } else if(line[i] == line[i+1] && pointer == (i - 1)){
            tempresult++;
            if(tempresult > result){
                result = tempresult;
            }
            tempresult = 0;
            pointer = -2;
        }
    }
    if(pointer != -2){
        if(tempresult > result){
            result = tempresult;
        }
        tempresult = 0;
        pointer = -2;
    }
    console.log(result);
});
rl.on('close', function() {
    process.exit(0);
});

var readline = require('readline');
var rl = readline.createInterface({
    input: process.stdin,
    output: process.stdout
});
rl.on('line', function(line){
    var lines = line.split(" ");
    var x = parseInt(lines[0]), f = parseInt(lines[1]), d = parseInt(lines[2]), p = parseInt(lines[3]);
    var result;
    if(parseInt(d/x) < f){
        result = parseInt(d/x);
    }else {
        result = parseInt(f) + parseInt((d - f * x)/(p + x));
    }
    console.log(result);
});
rl.on('close', function() {
    process.exit(0);
});