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747d4286847167bdc87ecac3dfe28780381c72a4: $$
\text{brick layer}
8f9bca51982b1e67ef2ebf8bcb4f153a188cc918: $$
\text{wood}
0694dd17ce235f61f699f91c4bdf63cce34ba4c4: $$
w_1
5dc47839a6ec8f858edd3981b7cdf96c4c89cc1d: $$
\ell_1
5e7725971b9e767630f7c7e8fb01c919bc7125fb: $$
\ell_1