Table:
text: 4-6-6-4
4-6-6-4 construction roster
4-6-6-4 construction roster
Railroad_quantity Class_ Road_numbers Builder Build_year
Northern Pacific Railway (47) Z-8 5130–5149 ALCO 1943–1944
Spokane, Portland and Seattle Railway (8) Z-6 900–905 ALCO 1937
Spokane, Portland and Seattle Railway (8) Z-8 910–911 ALCO 1944
Union Pacific Railroad (105) CSA-1 3900–3914 ALCO 1936
Union Pacific Railroad (105) CSA-2 3915–3939 ALCO 1937
Union Pacific Railroad (105) 4664-3 3950–3969 ALCO 1942
Union Pacific Railroad (105) 4664-4 3975–3999 ALCO 1943
Union Pacific Railroad (105) 4664-5 3930–3949 ALCO 1944
Western Maryland Railway (12) M-2 1201–1212 Baldwin 1940–1941
Western Pacific Railroad (7) M-100 401–407 ALCO 1938

text: 4-6-6-4
4-6-6-4 construction roster
4-6-6-4 construction roster
Railroad_quantity Class_ Road_numbers Builder Build_year
Clinchfield Railroad (12 new, 6 secondhand) E-1 650–657 ALCO 1942–1943
Clinchfield Railroad (12 new, 6 secondhand) E-2 660–663 ALCO 1947
Clinchfield Railroad (12 new, 6 secondhand) E-3 670–675 ALCO 1943
Delaware and Hudson Railway (40) J 1500–1539 ALCO 1940–1946
Denver and Rio Grande Western Railroad (21) L-105 3700–3709 Baldwin 1938
Denver and Rio Grande Western Railroad (21) L-105 3710–3714 Baldwin 1942
Denver and Rio Grande Western Railroad (21) L-97 3800–3805 ALCO 1943
Great Northern Railway (2 secondhand) Z-6 4000–4001 ALCO 1937
Northern Pacific Railway (47) Z-6 5100–5120 ALCO 1936–1937
Northern Pacific Railway (47) Z-7 5121–5126 ALCO 1941

Question: From the list of 4-6-6-4, what are the road numbers if the builder is Alco, the railroad (set) is Union Pacific Railroad (105), and the class is CSA-2?