#!/usr/bin/env lua

local prefixes = {
        [0] = "",
        [3] = "K",
        [6] = "M",
        [9] = "G",
        [12] = "T",
        [15] = "P",
};

function round(n)
        return tonumber(string.format("%.1f", n));
end

function divideNumber(n)
        local n = tonumber(n);

        if not n then error("Not a number", 2) end

        -- Get the log
        local l = ((n == 0) and 0) or math.floor(math.log(n, 10));
        -- Make it a multiple of 3, rounding down
        l = l - (l % 3);

        return round(n / math.pow(10, l))..prefixes[l];
end

for input in io.lines() do
        io.write(string.gsub(input, "%d+", divideNumber).."\n");
end