import std.algorithm;
import std.array;
import std.conv;
import std.math;
import std.range;
import std.stdio;
import std.string;
import std.typecons;

T read(T)() { return readln.chomp.to!T; }
T[] reads(T)() { return readln.split.to!(T[]); }
alias readint = read!int;
alias readints = reads!int;

void main() {
    auto abk = readints;
    int a = abk[0], b = abk[1], k = abk[2];

    for (int i = a; i <= min(a + k - 1, b); i++)
        writeln(i);

    for (int i = max(a + k, b - k + 1); i <= b; i++)
        writeln(i);
}
