(1 2)

# (map (@ 1 0-0)
#   (.sequence
#     (string (@ 1 1-2) ‘1’)
#     (string (@ 1 3-4) ‘2’)
#   )
#   (.result nil)
# )
# (map (@ 1 0-0)
#   (.sequence
#     (string (@ 1 3-4) ‘2’)
#     (string (@ 1 1-2) ‘1’)
#   )
#   (.result nil)
# )
# :1:0–1: warning: use of sequence in value statement is discouraged
#  (1 2)
#  ^
# :1:0–1: warning: alternated value statement is undefined unless the alternatives are identical
#  (1 2)
#  ^
# :1:3–4: error: more the one value in value statement
#  (1 2)
#     ^
# :1:1–2: error: more the one value in value statement
#  (1 2)
#   ^