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