#version 450

layout(local_size_x_id = 18, local_size_z_id = 19) in;
layout(local_size_x = 32, local_size_y = 32) in;

buffer bn {
    uint a;
} bi;

void foo(uvec3 wgs)
{
    bi.a = wgs.x * gl_WorkGroupSize.y * wgs.z;
}

void main()
{
    foo(gl_WorkGroupSize);
}