import std.stdio;
import std.algorithm;
import std.string;
import std.range;
import std.array;
import std.conv;
import std.complex;
import std.math;
import std.ascii;
import std.bigint;
import std.container;
import std.typecons;

auto readInts() {
	return array(map!(to!int)(readln().strip().split()));
}
auto readInt() {
	return readInts()[0];
}
auto readLongs() {
	return array(map!(to!long)(readln().strip().split()));
}
auto readLong() {
	return readLongs()[0];
}

const real eps = 1e-10;

void main(){
	auto l = "qwertasdfgzxcvb"d;
	while(true) {
		auto s = readln().chomp();
		if(s == "#") {
			return;
		}
		int ans;
		s.map!(c => !l.find(c).empty).reduce!((a, b) {if(a != b) ++ans; return b;});
		writeln(ans);
	}
}