// tested by Hightail - https://github.com/dj3500/hightail
import std.stdio, std.string, std.conv, std.algorithm;
import std.range, std.array, std.math, std.typecons, std.container, core.bitop;
import std.datetime, std.bigint;

void main() {
    readln();
    auto s = readln.split();

    int ans = 0;

    int vol(string w) {
        int res;

        debug {
            writeln(w);
        }

        foreach (ch ; w) {
            if (ch <= 'Z') res++;
        }

        return res;
    }

    foreach (w ; s) {
        ans = max(ans, vol(w));
    }

    writeln(ans);
}



void scan(T...)(ref T args) {
    string[] line = readln.split;
    foreach (ref arg; args) {
        arg = line.front.to!(typeof(arg));
        line.popFront();
    }
    assert(line.empty);
}


void fillAll(R, T)(ref R arr, T value) {
    static if (is(typeof(arr[] = value))) {
        arr[] = value;
    }
    else {
        foreach (ref e; arr) {
            fillAll(e, value);
        }
    }
}