बौधायन श्रौतसूत्रम् (कृष्ण यजुर्वेद तैत्तिरीय शाखा - सम्पूर्ण प्रश्न एवं श्रौत-याग कल्प सटीक)

?
Wait, let's look at another possibility:
Could it be "उक्थ्येन्द्राय"? If 'उ' fell off or it's "ऽ"?
Wait, is it "ऽयेन्द्राय" in the image?
Let's zoom in to maximum on the first word of line 14:
It shows:
ऽ (avagraha-like curve) then ये (or थे?) न्द्रा य
Wait, does it say ऽथेन्द्राय?
Wait! Could it be ऽथैन्द्राय? No, there is one e-matra.
Wait, could it be उक्थ्येन्द्राय?
Wait, look at: ऽ + थे = ऽथे?
Wait! Look at Caland's critical apparatus / text:
Let's search: "त्रिभिरुक्थ्यपर्यायैश्चरति" "संतिष्ठते माध्यंदिनं सवनं"
In Śrautakośa or Baudhāyana Śrautasūtra XII. 16:
"मार्जयन्ते । ... त्रिभिरुक्थ्यपर्यायैश्चरति । संतिष्ठते माध्यन्दिनꣵ सवनम् ।"
What are the ukthya-paryāyas in the midday pressing?
In midday, the three ukthas are Maitrāvaruṇa, Brāhmaṇācchaṃsin, Achāvāka