Insulation
insulation
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COLD
ENERGY
FIRE
HEAT
HOT
INSULATOR
STOVE
SUN
TRANSFER
E | R | O | M | T | T | Z | U | I |
L | H | E | A | T | H | K | N | E |
E | R | I | F | D | N | S | B | H |
X | E | A | D | S | U | U | T | V |
U | C | L | T | L | N | N | I | R |
F | Z | O | A | V | J | A | C | H |
S | V | T | L | S | G | B | R | O |
E | O | Z | I | D | P | T | T | T |
R | V | E | N | E | R | G | Y | W |
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