Minecraft Server Connection Error: Missing Mods for Player lsy6

The player "lsy6" attempted to join the server but was rejected due to missing mods. The server listed the required versions of the mods that were not found on the client, including CodeChicken Lib, CustomIcon, FutureDecoration, Iron Chest, Lucky Block, Mantle, Metamorph, MrCrayfish's Furniture Mod, Pixelmon, Pixelmon TCG, ProjectE, Reborn Core, SlashBlade, Tech Reborn, Tech Reborn Mod Compatibility, Tinkers' Construct, and custommc. The player was advised to download the correct versions of these mods in order to connect to the server.