import std.stdio,
       std.conv,
       std.string,
       std.range,
       std.math,
       std.algorithm;

void main()
{
    auto S = readln.strip;

    auto x = S.count!"a=='E'" - S.count!"a=='W'";
    auto y = S.count!"a=='N'" - S.count!"a=='S'";
    (x * x + y * y).to!real.sqrt.writeln;
}